Computer Reboots after Inactivity

I am running Windows 10 on a Lenovo T440s laptop, which I use as my primary computer.  The computer remains plugged in and on unless I periodically turn it off for updates or travel.   A couple of weeks ago the computer started rebooting at unexpected times.  I am never there when it happens, so I suspect it's tied to inactivity.   It is not the reboot that comes with occasional Windows updates, sometimes happening 2-3 times a day.  But I don't know what setting I can change to make it stop and remain on.  Please help.


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Ares KurkluSoftware EngineerCommented:
It may worth checking the power settings (additional ones too) like sleep option etc, something may be getting triggered which may cause the reboot I would start by changing the timings there, unless if it is a physical issue like memory etc.

You should also be able to check the event viewer and look at the logs to see what is going on.
Cliff GaliherCommented:
Intel released an update to address the Meltdown and Spectre bugs in their processors several weeks ago, and it was incorporated into a windows update.

Several days mater, it was found that the update caused unexpected reboots and was pulled.

The timing of your issue does not seem like a coincidence.

Microsoft has released a hotfix that disables the original problematic update, but it must be downloaded and installed manually. It is not yet on windows update.

A quick search should turn up the KB. I don't remember it off the top if my head and my phones browser is being flakey tonight, or I'd search and post it myself.

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Ankit PareekOnline MarketingCommented:
Hi Phil,

There can be many possible reasons why your computer might have restarted by itself. They can be hardware as well as software (operating system) issues. To help you with the concern, I have created a list of steps you can follow easily:

1. Press 'Windows' key on your keyboard.
2. Type 'Troubleshoot' and click 'Troubleshoot'.
3. Select 'Troubleshoot' option on the left side of the window
4. Click Blue-screen and run the troubleshooter (Follow each instruction).

You can also go SFC scan (System File Checker). Know how to perform SFC scan by visiting this link.

I hope that works for you!
philsimmonsAuthor Commented:
Thank you!
It should be made clear that the "pulled" updates don't affect any machines that did not do a firmware update as well. Since for 90% of machines that are older than 2 years, there simply is no firmware update (containing updated CPU microcode) available, most PCs are not even affected by this pulled update.
My suggestion: if it returns, re-open the question here.

Anyway, let me know if this suggestion did not help.
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