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Windows 7 Machine Shuts Down Unexpectedly

We have a Lenovo Desktop with Windows 7 that we use GoToMy Pc for remote use by 2 users.  It worked well for over a year and now the machine will unexpectedly shut down and we need to power it back up quite often.
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kheaney
Asked:
kheaney
5 Solutions
 
pjamCommented:
That usually is hardware, possibly motherboard.  Do you have a diagnostic CD to boot to and run diags?
We also see that in older computers that have bulged or burst Capacitors, look at the motherboard for strange looking capacitors.  Fairly inexpensive fix at a local computer store, much cheaper than a new motherboard.

Also take the side off the case and make sure the Power supply, Case, and CPU fan are running.  may be overheating.
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discgmanCommented:
Is there anymore details? Do you have a recovery disk that came with the desktop? Is there any errors? What does the error logs say?
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Don ThomsonCommented:
You can check the Error event logs un Manage Computer and see if there are any critical errors - If not then I suspect that either the Power Supply may be faulty or that there is an overheating problem. An overheating problem may be a slow CPU or Case or Power supply fan  or a loose CPU heat sink
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John HurstBusiness Consultant (Owner)Commented:
Lenovo Windows 7 desktop (and laptops for that matter) are very stable and so is Windows 7.

Run System File Checker. Open cmd.exe with Run as Administrator and allow to complete. Restart and test.

Check for viruses and malware (likely problem). Use Malwarebytes along with your own application. (malwarebytes.org).

Finally you can try a Windows 7 Repair Install. You should be able to start this with the Recovery Partition. Back up the machine first and with certainty in case something goes wrong.

There is a Seven Forums tutorial for Repair Install

http://www.sevenforums.com/tutorials/3413-repair-install.html
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Ricardo MartínezInformation SecurityCommented:
Microsoft has reported some errors in an update, it was about 3 weeks ago. I had the same problem in Windows 8.1 when the computer hibernates or stay too much time inactive. Check for system updates, i solved it that way. In some forums they say it's a hardware problem, and that you must update your drivers, you can check that too.
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*** Hopeleonie ***IT ManagerCommented:
Do you have Minidump's?
If yes, please Zip them and upload it here.
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kheaneyAuthor Commented:
These are a great help!
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