• O.T. computer speakers blowing

    From Robert in CA@21:1/5 to All on Tue Sep 13 13:33:18 2022
    I have a Dell XPS 8500, with Windows 7 Professional, SP1,
    with Spywareblaster, Malwarebytes, Avast , Windows Defender
    and Windows firewall.

    Seagate Desktop HDD ST2000DM001 2TB 64MB
    Cache SATA 6.0Gb/s 3.5" Internal
    Ram 12.0 GB
    System type : 64-bit operating system

    I also have

    I have a Dell Optiplex 780 Tower, with Windows 7 Professional,
    SP1, with Spywareblaster, Malwarebytes, Avast , Windows Defender
    and Windows firewall.

    Seagate Desktop HDD ST2000DM001 2TB 64MB
    Cache SATA 6.0Gb/s 3.5" Internal
    System type : 64-bit operating system

    and (external hard drives)

    (8500)
    Seagate Desktop HDD ST6000DM001 6TB
    128MB Cache SATA 6.0Gb/s 3.5" Internal
    Hard Drive

    (780)
    Seagate Desktop HDD ST2000DM001 2TB 64MB
    Cache SATA 6.0Gb/s 3.5"
    Internal Hard Drive


    This has to do with the 8500. There's actually nothing wrong with the
    system per se but we recently had a couple of power outages and it blew
    my speakers (harman kardon hk695) and this is the second time it's
    happened and I've had to replace them and the last set was brand new. I
    live in a mobile home that isn't grounded and that's the main problem
    but isn't there some of way of stopping this from happening again short
    of re-wiring the entire home?

    We recently had a fire that came through our area (the Fairview fire)
    and I had to evacuate in like 30 minutes but took both computers, the
    monitor and the external HD's and disks etc. I just returned yesterday
    and thankfully all is OK. but I suffered collateral damage because the
    utility company decided to cut the power twice in the middle of the fire
    and 108 degree heat to do their maintenance and blew my speakers in the
    process even though they weren't connected to a computer but they were
    still plugged in to the surge protector and APC.


    Thoughts/Suggestions?
    Robert

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  • From Paul@21:1/5 to Robert in CA on Wed Sep 14 02:25:06 2022
    On 9/13/2022 4:33 PM, Robert in CA wrote:

    This has to do with the 8500. There's actually nothing wrong with the system per se but we recently had a couple of power outages and it blew my speakers (harman kardon hk695) and this is the second time it's happened and I've had to replace them and
    the last set was brand new. I live in a mobile home that isn't grounded and that's the main problem but isn't there some of way of stopping this from happening again short of re-wiring the entire home?

    We recently had a fire that came through our area (the Fairview fire) and I had to evacuate in like 30 minutes but took both computers, the monitor and the external HD's and disks etc. I just returned yesterday and thankfully all is OK. but I suffered
    collateral damage because the utility company decided to cut the power twice in the middle of the fire and 108 degree heat to do their maintenance and blew my speakers in the process even though they weren't connected to a computer but they were still
    plugged in to the surge protector and APC.

    Thoughts/Suggestions?
    Robert

    The best AC protection, is the double conversion UPS. These are used by IT people in server rooms. We had one with a several kilowatt rating, at
    the place I used to work. This one has sine wave output, rather than the stepped square wave of the APC. The shape of the power waveform, only matters in certain circumstances (ATX supplies with active PFC perhaps).

    https://www.amazon.ca/1000Va-Double-Conversion-System-Critical-Network/dp/B00180HW6G/

    With prices around $1000, that's the reason I don't own one. The current state of
    online sales catalogs, makes it hard to get complete listings of product lines for comparison. I was lucky to find that traditional looking one. They can be rack mount low-boy form factor, rather than a "tower" like an APC.

    A double conversion has a cooling fan on the back. It makes the sine wave
    and kicks off some heat while doing so. These can still be destroyed by a direct lightning hit, but just about anything suffers that way.

    AC ----- DC ----- AC
    |
    BATT

    \-----------------/
    Double conversion

    If the input was 140VAC, the output would continue to be 115VAC.

    Your wall clock, may or may not keep good time, if run off the AC output :-)

    *******

    The surge protector, on a three prong plug, has three paths. If you don't
    have the third prong, and use an adapter so safety ground does not touch,
    then only 1/3rd of the surge protector is working.

    https://i0.wp.com/electronicsbeliever.com/wp-content/uploads/2017/02/pic-9-1.png?w=628

    But in your failure case, I don't see a reason to believe that the other protection modes would have helped at all. So this is just a comment,
    on the difference of running with and without a ground. If any equipment
    in the room happened to have an "incidental ground", that's when having
    the surge protector work properly would matter.

    For surge protectors with the $50,000 "warranty", of course your lack of
    ground immediately invalidates that warranty. They always find
    an excuse for not paying off, so this isn't really a surprise.

    *******

    Audio equipment does not use a SMPS (switch mode power supply) inside.

    Instead, common practice, is to have a transformer,
    rectifiers, and filter capacitor, producing a "raw" DC voltage.

    The raw DC voltage, rises and falls as the AC power rises and falls.

    If there's a giant transient on the AC, guess what happens ?
    Kablooie.

    The raw DC voltage inside the equipment, is consumed directly
    by various subsystems. Your unit (hk695) has a self-test jack,
    with a sine wave on it, and also has some sort of audio transform
    for making 2.1 signal from 2-ch input or 4-ch input. A 2-ch
    transform could be done with a crossover network and nothing
    fancy. Converting from 4-ch input would be more difficult.

    It may have more than just amp circuitry in it, and may have some
    digital signal processing.

    Any power transient which enters one of these "unprotected" audio products, spells havoc in terms of damage. I lost my stereo to high AC voltage,
    and it killed the mixer, the tuner, the vacuum fluorescent front display, one... item... at... a... time. When I threw the stereo out, just the amp
    still worked. The rest of it was dead. And all because the raw DC inside
    the unit, was constantly... too high.

    *******

    This 2.1 system is USB powered. It can run off a USB3 connector, and
    give around 2W per channel or less. However, if you plug in a 5V 2A wall adapter to the unit, that's supposed to help on the output. Whether that
    makes any difference, is hard to say. A 5V 2A wall adapter (if you used it) would be a "regulated" power source. The "plus" version
    is the version with the fake subwoofer (it does not go down to 20Hz!).
    The USB3 connector (5V @ 900mA) is also a "regulated" power source.

    https://www.newegg.com/black-creative-pebble-plus-wired/p/N82E16836116213

    https://en.creative.com/p/speakers/creative-pebble-plus

    Frequency Response 50–20,000 Hz
    Power Output Not much

    If your hearing needs the extra power of a monster set of speakers,
    then I'd not buy that :-) That has about as much output power as
    my home-made amp. Mine does not rattle the gypsum board exactly.

    That is an example of an audio solution, where "raw" DC is not used.
    There's at least one stage of regulation in the path at all times,
    so there is at least some protection from transients. If the PC is
    ruined, the speakers will be ruined, but not before. The speakers
    could end up being as robust as the computer.

    *******

    This is basically too expensive to "fix" as such. Not on the AC side of it.

    A Tesla PowerWall, is a double conversion. And more expensive than
    the $1000 double conversion UPS. The PowerWall has a lot longer battery
    backup time constant.

    A motor-generator set, is another way to protect household items.
    They might last around ten years, and need bearing oiling once a year.
    Under no load, the motor still wastes a bit of power. Like the
    double conversion UPS (which wastes power), they're in the same class.
    The motor generator set might have slightly better lightning punch-thru protection. I think these are cool (we had these in Power Systems lab).
    But they're not really a home-compatible thing for most people.
    The inertia in the rotating mass, helps ride through transients,
    and these are used when changing from single phase to three phase
    for a wood shop. You could get single-phase to single-phase, or you
    could get single-phase to three-phase, as examples of types. The three
    phase one would be so you could run a West Bend lathe.

    Paul

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  • From JJ@21:1/5 to Robert in CA on Wed Sep 14 13:25:47 2022
    On Tue, 13 Sep 2022 13:33:18 -0700, Robert in CA wrote:
    [snip]

    This has to do with the 8500. There's actually nothing wrong with the
    system per se but we recently had a couple of power outages and it blew
    my speakers (harman kardon hk695) and this is the second time it's
    happened and I've had to replace them and the last set was brand new. I
    live in a mobile home that isn't grounded and that's the main problem
    but isn't there some of way of stopping this from happening again short
    of re-wiring the entire home?


    That makes me wonder. How did space shuttle/station do their electrical grounding? Cause there's no actual ground there. Do they made the hull as
    the ground? If so, is that even safe?

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  • From R.Wieser@21:1/5 to All on Wed Sep 14 09:22:47 2022
    JJ,

    That makes me wonder. How did space shuttle/station do their
    electrical grounding? Cause there's no actual ground there.
    Do they made the hull as the ground? If so, is that even safe?

    The whole idea behind "grounding" is to make the stuff a person can touch directly is of the same potential as the person himself. No more, no less.
    It doesn't matter if the floor he's walking on is at 50KV in regard to our planet, as long as the voltage difference between himself and whatever he is touching is near to zero.

    So yes, using the hull (and all other metal connected to it, including the floor(s) the astonauts are "walking on") as "the ground" is perfectly safe,
    and functions the same way as it would on Earth.

    Regards,
    Rudy Wieser

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  • From Paul@21:1/5 to Robert in CA on Wed Sep 14 23:01:19 2022
    On 9/14/2022 10:22 PM, Robert in CA wrote:
    I kind of figured it would be something like that
    and beyond my means.

    I remember the time when the electrician wired my
    place for 220 instead of 110 and fried allot of stuff.

    I bought another set of (harman kardon hk695) speakers
    (used) off of eBay and should arrive Monday. I'm hoping
    that it's just the base module that's blown and I can still use
    my satellites. That's what happened last time. In any event
    I'll have the new satellites in case they don't.

    Thanks,
    Robert


    I wish they made UPS, small ones, just to solve this
    problem, but I don't really know whether a Line Interactive
    could stop damage like has happened. Double Conversion,
    is the way to go when "it must be protected". That's
    why server rooms have those.

    You see, the Double Conversion ones are priced for business
    usage. The makers don't see a consumer market for ultra-reliable
    electricity.

    But if anything is going to get blown by electrical work,
    the poor design of stereos, is the first thing to go.

    Paul

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  • From Robert in CA@21:1/5 to All on Wed Sep 14 19:22:04 2022
    I kind of figured it would be something like that
    and beyond my means.

    I remember the time when the electrician wired my
    place for 220 instead of 110 and fried allot of stuff.

    I bought another set of (harman kardon hk695) speakers
    (used) off of eBay and should arrive Monday. I'm hoping
    that it's just the base module that's blown and I can still use
    my satellites. That's what happened last time. In any event
    I'll have the new satellites in case they don't.

    Thanks,
    Robert

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  • From Robert in CA@21:1/5 to All on Thu Sep 15 14:01:39 2022
    Exactly,, I'm lucky my stereo is OK,.. but it's partly my fault for
    not un-plugging it before I left. I think the cheapest way is
    just to stock up on speakers and base modules in case it
    happens again. I already have two sets of new satellites speakers
    from when it blew before. Kinda of like having spare power supplies
    and HD's for the computer.

    I wanted to ask you about my sisters computer although
    I can't remember much. It's a Hewlett Packard with 3 GB AMD
    HD I think running FF off of Vista OS and it's as slow as a dog
    She also had an icon for Chrome but preferred not to use it.

    She doesn't have any anti-virus/anti-malware protection at all!
    She does have her firewall up and automatic updates running but
    I checked and uploaded (10) updates. I also checked to see if she could
    upgrade to Win 7 but apparently not?

    I heard that Vista and Win2000 pretty much sucked. I could navigate
    OK but it was slow to respond and also didn't have any sound because
    the two sets of speakers had only a single input plug. What kind of
    system uses speakers with only one input plug? Yet when I checked
    it said it was running?

    Would not having any anti-virus/anti-malare slow the computer
    down significantly? or what else could be causing her computer
    to run slow? Maybe malware or a virus she doesn't know about
    because she has she has zero protection and therefore is unaware
    they may be there?

    Thoughts/suggestions?
    Robert

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  • From Paul@21:1/5 to Robert in CA on Thu Sep 15 21:26:49 2022
    On 9/15/2022 5:01 PM, Robert in CA wrote:
    Exactly,, I'm lucky my stereo is OK,.. but it's partly my fault for
    not un-plugging it before I left. I think the cheapest way is
    just to stock up on speakers and base modules in case it
    happens again. I already have two sets of new satellites speakers
    from when it blew before. Kinda of like having spare power supplies
    and HD's for the computer.

    I wanted to ask you about my sisters computer although
    I can't remember much. It's a Hewlett Packard with 3 GB AMD
    HD I think running FF off of Vista OS and it's as slow as a dog
    She also had an icon for Chrome but preferred not to use it.

    She doesn't have any anti-virus/anti-malware protection at all!
    She does have her firewall up and automatic updates running but
    I checked and uploaded (10) updates. I also checked to see if she could upgrade to Win 7 but apparently not?

    I heard that Vista and Win2000 pretty much sucked. I could navigate
    OK but it was slow to respond and also didn't have any sound because
    the two sets of speakers had only a single input plug. What kind of
    system uses speakers with only one input plug? Yet when I checked
    it said it was running?

    Would not having any anti-virus/anti-malare slow the computer
    down significantly? or what else could be causing her computer
    to run slow? Maybe malware or a virus she doesn't know about
    because she has she has zero protection and therefore is unaware
    they may be there?

    Thoughts/suggestions?
    Robert


    It's surprising to me, that Vista SP2 could even do a Windows Update.

    My experience with Vista here, is Windows Update just spins and spins,
    and produces no updates. This is due to scaling issues on *all* Windows OSes, even on Windows 10. Microsoft chose to hide these issues on W7,W8,W10,W11,
    by using "Jumbo Updates". one large file, instead of many smaller files.
    This may reduce the rate of slowdown in the Updater.

    So right away, your sister leads a charmed life :-)

    Since it is Vista, the disk alignment is to 1048576 boundaries (1 megabyte), and this is good for flash memory devices. This means you could buy
    a small SATA SSD and install it in the PC in place of the Hard Drive.
    And clone the old HDD drive, to the new SSD drive. The SSD has zero seek time.

    The machine may be dog-slow, because the SMART is trying to tell you
    that drive failure is imminent.

    You could start with at least a single backup of the drive, for
    safe keeping. This will reduce the impact, the day the PC won't
    start at all because the HDD has stopped.

    The machine could also be slow, because wususerv Service Host is
    railed all the time. This is a side effect of Windows Update.

    On the Pro OSes, you can do

    tasklist /svc

    and list the names of all SVCHOST processes and what services
    live inside them (wuauserv). Sysinternals Process Explorer
    may also be able to show this information, when run as Administrator.

    It's unlikely Vista would receive much in the way of updates
    today. But the update subsystem is still capable of wasting
    computer resources. Oh, yes.

    Summary:

    1) Make your backup FIRST. If the recipient never makes backups,
    this is a priority item. I smell trouble brewing.

    2) Do cleanup, like check %temp% for files. Or check the browser cache
    (search for "cache2") and see if that has a lot of files in it.
    Some users may be using Piriform CCleaner, in which case
    you can skip this step.

    3) Next, try defragmentation. JkDefrag-3.36.zip

    https://www.kessels.com/JkDefrag/

    Start a command prompt window as administrator.

    cd %userprofile%
    cd Downloads
    cd jkdefrag # Assumed location of unpacked goods.

    jkdefrag -a 1 -d 2 c: # Draw blocks diagram of disk, showing fragmentation
    # The file jkdefrag.log contains info on the volume, but
    # you have to wait "until the file stops growing", before
    # opening in Notepad. the more fragmented the drive, the longer
    # it takes for the jkdefrag.log to stop growing.

    jkdefrag -a 5 -d 2 c: # Push disk blocks down towards partition origin.
    # This is a crude form of consolidation. Not absolutely necessary.

    jkdefrag -a 2 -d 2 c: # This does basic defragmentation, and is not as neat and tidy
    # as the WinXP build-in Presidents Software defragmenter.

    Do not do this on a sick hard drive. Have a Backup in hand, if doing this.

    4) Once neat and tidy, consider cloning over to an SSD.
    5) If the disk fails during (3), you have your backup in hand.

    6) If Vista needs to be reinstalled... this will be one bitch
    of a project. It took me three tries to get this to work, and
    about *one week* of work. The trick to getting it to work, is
    using a wsusoffline stick from the last Vista version, as wsusoffline
    knows more about updating, than Microsoft does.

    7) Vista upgrades to W7, at the cost of a license. While you could
    still buy them, I think my W7 was about $150 CDN or so. W7 can upgrade
    to W10 for free (as long as the free offer continues, and it'll have to
    stop when W10 hits end of life).

    Personally, I think of Vista SP2 as "just fine", but, to make it
    "just fine", you will have to be in top form, as a PC technician.
    No mom and pop store is going to invest hours and hours of work,
    doing this the right way. Shops like to "nuke and pave", and they
    *might* even refuse to touch Vista SP2 at all. Because they know what
    an evil festering mess awaits them. I like to think of this as
    a "challenge", even if it takes a solid week of trying stuff.

    Summary: At least check her drive with the SMART in HDTune.
    It could be the reallocations are high, and the drive is
    just about toast. And MAKE A BACKUP. You can currently pick
    up a 1TB WDC Black for $60 or less, which may be big enough
    for the 320GB drive she might have. Given the age of the machine,
    I can't tell for sure it even has a SATA port. If you use a
    Samsung 870 EVO 1TB, you can run one of those off a USB to SATA
    cable -- even if the drive does not appear to have a place to
    connect directly, the adapter cable can allow the same drive to be
    connected to an exterior USB2 port.

    Suited to low-power SSD drives - USB3 to SATA, about 250MB/sec on a good day $12
    https://www.newegg.com/startech-usb3s2sat3cb-usb-to-sata/p/N82E16812400542

    SAMSUNG 870 EVO Series 2.5" 1TB SATA III V-NAND SSD MZ-77E1T0B/AM (about 600TBW) $100
    https://www.newegg.com/samsung-1tb-870-evo-series/p/N82E16820147793?Item=N82E16820147793

    Of course, one of your enclosures plus a drive, can easily be used
    instead of those two items.

    The following are excellent drives if you can find one. I bought three, one was bad,
    and that was my first bad WDC... ever. But the ones that work, work fine. I have at least four of these now. This would be, if you just wanted to clone from one HDD to a second HDD. And this is SATA, so the machine needs SATA ports inside to use this. You could make it work with an IDE cable, with an IDE to SATA
    adapter, but those will be hard to find (a "good" one). You need different adapters if you expect to plug two IDE to SATA adapters into one ribbon cable. The adapter
    I've got, only works on the end connector of the ribbon (it's a Master adapter, not
    an M/S jumpered one).

    1TB internal HDD $50 Replacement SATA internal HDD https://www.newegg.com/black-wd1003fzex-1tb/p/N82E16822236625

    HTH,
    Paul

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  • From Robert in CA@21:1/5 to All on Fri Sep 16 00:12:02 2022
    Your correct about Windows Update. After I did the (10) updates
    I checked again and it gave a message about it no longer being
    available.

    I went into Task Manager to see if I could see anything but
    didn't think of HD-Tune or Defragging.

    It all sounds good to me. I could do everything except the
    backup for her since she doesn't have an external hd.

    However, I'm no longer at my sisters but back home and were
    separated by 450 miles . Unfortunately I know she wouldn't let
    me do all the things you propose. She wouldn't let me install
    malwarebytes while I was there and I know she wouldn't be into
    buying a external hd. It's just how she is.

    I was just wondering what you might think the cause
    of it being so slow.

    Many Thanks,
    Robert

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  • From Paul@21:1/5 to Robert in CA on Fri Sep 16 04:59:07 2022
    On 9/16/2022 3:12 AM, Robert in CA wrote:

    Your correct about Windows Update. After I did the (10) updates
    I checked again and it gave a message about it no longer being
    available.

    I went into Task Manager to see if I could see anything but
    didn't think of HD-Tune or Defragging.

    It all sounds good to me. I could do everything except the
    backup for her since she doesn't have an external hd.

    However, I'm no longer at my sisters but back home and were
    separated by 450 miles . Unfortunately I know she wouldn't let
    me do all the things you propose. She wouldn't let me install
    malwarebytes while I was there and I know she wouldn't be into
    buying a external hd. It's just how she is.

    I was just wondering what you might think the cause
    of it being so slow.

    Many Thanks,
    Robert

    Well, it is Vista, and slogging like that is normal.

    But you have to keep your eyes peeled for things
    like hard drive trouble. Given the age of the machine,
    things like that need scrutiny so they don't turn into
    a disaster ("I lost all my emails when the HDD died").

    Good luck on your next visit :-)

    Paul

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  • From Robert in CA@21:1/5 to All on Fri Sep 16 10:17:30 2022
    I'll refer her to this page when I visit next time so she
    can read your suggestions and maybe she'll let
    me do some of them.

    I'll try defraggging it next time and see if that helps
    and maybe disk cleaner using the default settings?

    Thanks again for all your good help,

    Robert

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  • From Robert in CA@21:1/5 to All on Fri Sep 16 19:29:18 2022
    I checked and I don't seem to have a HD Tune
    download although I have the application.

    You know me and my history of downloads
    so could you please give me a reliable download ?


    Thanks,
    Robert

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  • From Robert in CA@21:1/5 to All on Fri Sep 16 19:43:34 2022
    I just emailed your recommendations to my sister
    but need the HD-Tune download so she can use it
    check the SMART.

    Thanks,
    Robert

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  • From Robert in CA@21:1/5 to All on Fri Sep 16 23:14:13 2022
    Thanks, I appreciate it,.

    Many thanks for all your good help,
    Robert

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  • From Paul@21:1/5 to Robert in CA on Sat Sep 17 01:59:18 2022
    On 9/16/2022 10:43 PM, Robert in CA wrote:
    I just emailed your recommendations to my sister
    but need the HD-Tune download so she can use it
    check the SMART.

    Thanks,
    Robert


    http://www.hdtune.com/download.html

    # Free version (has SMART table with Reallocated Raw data field for checking)

    http://www.hdtune.com/files/hdtune_255.exe

    The other aspect of the checking, is to run the
    benchmark curve, wait for it to finish, and check
    for downward_wide spikes indicating all the
    reallocate-able sectors are used up.

    The OS can upset a benchmark run, by doing excessive reads
    while you benchmark. Sometimes you have to wait a bit,
    and run another benchmark.

    The right-most tab can do a bad block scan. Which
    helps identify severely sick hard drives. When the Reallocated
    hits 300 or so, you just might uncover a red block in a bad
    block scan.

    I don't think my Dell Refurb had reallocated showing, but it did
    have four bad blocks on it, presumably caused by the orientation
    of the drive. I could tell from the failure pattern, the
    sector was likely errored from a "high fly" error. The sector
    next to it, had good CRC, but the info in the sector was stale.
    Indicating the head was not close enough to finish the write.
    I don't have too many other drives here, except that one,
    as a demo vehicle for "bad blocks". I have around five drives
    with 300 or so for the Reallocated Raw, and those are drives
    I no longer trust. But they still pass a bad block scan, with
    all green blocks.

    Paul

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  • From Robert in CA@21:1/5 to All on Sat Sep 17 16:07:51 2022
    Just thought you'd like to know I got the used speakers today
    and hooked up the base module and the satellites lit up again
    so I didn't have to replace them with the others. So all is good
    and back to normal.

    Also my sister is going to take your suggestions and/or upgrade
    to a new computer. I recommended refurbished computers
    where we bought the Dell 780.

    Thanks again,
    Robert

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