Windows 10: PC Restarting randomly, no warning, no explanation, no BSOD

This is extremely annoying. New PC, built it myself about a month ago, no prior experience.

System Builder - Ryzen 5 1600 3.2 GHz 6-Core, GeForce GTX 1660 Ti 6 GB SC ULTRA GAMING, MX330 ATX Mid Tower - PCPartPicker Windows 10 pro. Had some kinks to work out in the first week but it's been pretty good since and the last few days it's just restarted a lot without warning. No blue screens.

It's not the CPU temp - been monitoring with Core Temp, it has restarted with the temp 50-60C.

I thought it might be Windows updater because of what the reliability control panel shows here

https://media.discordapp.net/attachm...99/unknown.png

See? Windows Defender updates happened after some bunches of restarts... so I turned off windows updater...least I think I did. I went to Services App, and disabled Windows updater and Windows Update Medic Service. It shows them as disabled/manual, and not currently running. I set my 'active hours' from 9 a.m. to 1a.m. to keep it from doing any auto updates/restarts in that period. I also set my network connection to Metered. I've tried sfc /scannow, no integrity violations. It has happened while watching TV with VLC. It has happened while streaming games on twitch (several times in between matches of Apex Legends, but not in the middle of a match). it has happened while running games off-stream. it has happened while all that was running was discord and Firefox trying to solve the problem. It has happened while all I had opened was control panel. It has even happened before I opened anything at all. Tried some stress testing, simultaneously ran Prime95 Small FFT and Unigine Valley at max settings and my PC didn't restart so I don't think it's CPU/GPU/PSU, they got pretty warm. It does seem to be the worst when trying to play/stream games but it's so inconsistent. My best guess is the 'Security Intelligence Update for Windows Defender Antivirus' because that seems to always show up on reliability monitor after a bunch of restarts but I don't know what to do about it or why it would cause multiple automatic restarts per update...

:)

 

BSOD randomly

friend keeps getting BSOD
any suggestions?

 

Pc restarts randomly

I've got a problem with my pc, it restarts randomly without any bsod, I get event 41 only. Can it be caused by bus speed spikes? Here are some I saw:
 





As you can see the cpu multiplier is set to 40. The bus looks like raising close to 103MHz, it doesn't seem ok.

Here's the setup:
PSU: Corsair VS 450W
MOBO: MSI H81M-P33
CPU: Pentium G3258 @4ghz 1.2V
RAM: Crucial 8GB 1600MHz CL11
GPU: Gigabyte GTX950
HDD: Samsung SP2504C
ODD: Asus DRW-24F1ST
Windows 10 64-bit

It's crazy because I can run world of tanks and it will restart over and over, then I would run gta 5 and it will be fine.

 

Pc gets BSOD randomly

Hello I wanted to know if anyone can help me stop my pc from getting the BSOD. It randomly occurs while booting up of after being in use. The minidump says it was caused by svchost.exe. (I did a fresh install of windows but it didn't fix the problem) any
suggestions?