PC randomly shuts down after 1/13/2015 updates.

Background: Ever since the 1/13/2015 patch Tuesday home PC will shut itself down while idle. It could be 15 minutes, or three hours later. Each time the power button is needed to turn on PC, and sign back in. It hasn't shut off while being used, but if left idle it will power off.

Steps taken so far: Cleaned registry. Cleaned history. Restored PC to before updates, and then manually updated again (previous updates were automatically installed). Changed/checked all power options to make sure nothing was set to turn PC off. Everything (That I can find) is set to high performance, or set to "never".

Running Windows 8.1 with every update released to date installed. My next step is to run SFC, and to see if I can find an error log. I have no idea what is causing it. I'm thinking an update messed something up, but all the updates installed were needed (they didn't show as optional), so I don't want to uninstall them. Any help would be awesome.

UPDATE - It's actually a BSoD. I checked event logs, and under critical it showed: Event ID 41 kernel-power

What did you use to "clean registry?"

If anything other than CCleaner then you probably ruined your install and should Clean Reinstall Windows 7 this time using only the tools and methods which work best for Win7.

CCleaner is what I used. I ran SFC /scannow, and it found errors, but couldn't fix some. I rebooted, and ran it again, and got the same message, so I ran CCleaner.

If you have the bugcheck file then upload the BSOD reporting information following Blue Screen of Death (BSOD) Posting Instructions - Windows 7 Forums.

If files won't repair after running 3 separate SFC attempts, or attempting to manually replace the files as shown in the tutorial for SFC /SCANNOW Command, and performance problems persist, then the next step which often works is to do a Repair Install.

However I'd wait to also hear what a BSOD analyst says about your bugcheck file if there is one to upload.

gregrocker said:

If you have the bugcheck file then upload the BSOD reporting information following Blue Screen of Death (BSOD) Posting Instructions - Windows 7 Forums.

If files won't repair after running 3 separate SFC attempts, or attempting to manually replace the files as shown in the tutorial for SFC /SCANNOW Command, and performance problems persist, then the next step which often works is to do a Repair Install.

However I'd wait to also hear what a BSOD analyst says about your bugcheck file if there is one to upload.

Thank you for the help. I will get the report to upload there. I only ran SFC twice. Should I run it again? You say after 3, or are you just generalizing? As in no matter how many times I run it?

The rule of thumb is three separate attempts. I will tell you however that this has never repaired unfixable files for me. I go by whether performance is affected at all, or any system functions are impaired. If so then I would move to the Repair Install.

If you have a good System image this can also be a time to consider applying it after backing your files up, although they should always be backed up anyway. This is the reason many of us use a separate Data partition, so that after reimaging C the data is safe and current in its vault, and the image is more compact without data.

Macrium Imaging - Windows 7 Help Forums