Strange Issue with Reboots

NightShift

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For the last 2 months or so I've been having issues with my PC whereby it randomly seems to hang and reboot within the first 15 minutes of initially being booted up. Sometimes it does this twice, and then it seems to stablise and will run will 11+hours without any issues. Trying to diagnose this has been maddening.

In the event log, I only see an error relating to unexpected shutdown, and there is nothing that I can tell that is out of the ordinary. I initially thought that this was down to Windows 10 being a buggy mess, so I reinstalled it. After the reinstallation, I experienced another freeze and reboot. At one point, my BIOS appears to have lost the boot order of my drives after one of these reboots, and that needed to be set again.

Over the weekend I installed an additional stick of RAM, and took the liberty of trying to blow away as much dust as possible in the case, check everything was correctly connected, clear out the USB ports and firmly reconnect everything. In the last 2 boots I haven't experienced any issues, but was just wondering if you guys would have any similair experiences or ideas as to a) what could be causing this (most likely) and b) how I could troubleshoot it without spending R10k on buying spare parts to swap out.

So far I've narrowed it down to:
1. A failing motherboard (only had this MSI for 2 years)
2. A failing power supply (had this one for 5+ years)
3. A failing graphics card (just 1 year)
4. Something else

Not a very narrow list...
 
Update your drivers. I suggest Driver Booster.
Double check for malware as well.
I won't call Windows 10 a buggy mess. If it's not hardware related the next is software as my steps suggest.
 
Thanks I did update all of my drivers and still had the issue after the Windows 10 re-install. The reinstall was my last easy resort. I've gone 3 days now without a random reboot and all I did was clean our dust, make sure everything was properly connected, and installed an extra 8GB RAM. I'm not convinced the issue is resolved so will keep an eye on it. Very strange behaviour :/
 
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