this post was submitted on 21 May 2026
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PC randomly restarts out of nowhere (sh.itjust.works)
submitted 16 hours ago* (last edited 11 hours ago) by HerbalGamer@sh.itjust.works to c/pcmasterrace@lemmy.world
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As title suggests.
Coming home the other day I find my PC started to restart out of nowhere, with no warning before or errors afterwards. I haven't changed anything and haven't had this problem before.

Any suggestions on what to do?

Device specs:
Processor Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz 3.60 GHz
Installed RAM 64.0 GB
Storage 233 GB HDD ST9250315AS, 112 GB SSD OCZ-VERTEX2, 466 GB SSD Samsung SSD 970 EVO Plus 500GB
Graphics Card NVIDIA GeForce RTX 3060 (12 GB)
System Type 64-bit operating system, x64-based processor
OS Windows 10

UPDATE: Memtest got through 2 out of 4 passes in under 4 hours before I got fed up with waiting, which in itself seems a good sign since it didn't restart there.
Event viewer showed one odd Event: The process C:\WINDOWS\Explorer.EXE (ANDROID-17) has initiated the restart of computer ANDROID-17 on behalf of user ANDROID-17\smuld for the following reason: Anderer Grund (geplant) Reason Code: 0x80000000 Shut-down Type: restart Comment:

No idea why because automatic restart is disabled.

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[–] Malix@sopuli.xyz 3 points 16 hours ago (1 children)

Does the restarts happen on idle, gaming/heavy load, or just randomly?

Idle/Random tends to point to ram sticks being faulty, run memtest for few hours or so?

Heavy load crashing could mean flaky power supply.

[–] HerbalGamer@sh.itjust.works 2 points 16 hours ago (2 children)

Really anytime; first I only noticed it had happened when I left it idling and came back to a login screen, but other times I was just watching youtube and scrolling Lemmy.
I've had it happen during gaming once I think but it didn't seem to be because it was too much; it was just a random moment without anything special happening.

[–] Malix@sopuli.xyz 3 points 16 hours ago (1 children)

I'd throw memtest on a throwaway usb stick and let it run tests overnight or so, unless errors appear immediately.

Easier than doing a reinstall. :)

[–] HerbalGamer@sh.itjust.works 2 points 16 hours ago

Got it, will do. Thanks.

[–] 9point6@lemmy.world 2 points 16 hours ago

Ah there goes my idea, I thought it was gonna be down to Microsoft's inability to not fuck sleep up every couple of years

Memory is probably the next port of call if you don't see anything in event viewer to indicate a driver issue.

Another commenter suggested memtest which is a good shout, might be also worth putting a Linux distro onto a flash drive or partition and try running that for a couple of days to see if it does it under Linux, that will at least help inform you as to whether it's hardware or software