Windows 10: PC freezes and makes buzzing sound after being on for several hours.

When my PC has been on for a few hours it freezes and makes a buzzing sound in my headphones, I have to restart the PC sometimes it can be once or a couple of times. I have researched and ran the sfc scan now and dism commands in cmd, checked for updates in device manager, made sure the fans are working and the pc is ventilated and I have ran the memory diagnostics tool but still having the issue, could anyone please help? Recently I took the case off and cleaned the dust with a air blower, I also undervolted the gpu following a video on YouTube and went on windows event viewer and had critica

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My PC freezes and makes a buzzing sound

My Pc will sometimes freeze and begins making a buzzing sound and will not unfreeze. I have to restart my computer in order to get it to stop. Im not sure how to fix this problem.

 

PC freezes, makes a buzzing sound, and restarts.

 

Windows 10 freezing with loud buzzing sound

i'm having a lot of problems on my Windows 10 machine and to be honest i'm giving up on it, it used to run games well but now it crashes with a loud buzzing sound even in games that it used to run flawlessly, any help will be appreciated since no one i know has wanted or cared to help me, i've tried updating drivers, windows memory check, updating motherboard drivers, checking drive health and none proved effective, even clean installs of windows won't help, what do i do?
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