PC speakers and monitor randomly flashing on, even while PC is turned off
I've had this problem for about a week now, despite having had no change in hardware or software in that time.
Twice the following has occurred while the PC is off:
Speakers suddenly start krackling loudly for a few seconds (this has happened at night and is really spooky)
Monitor flashes on and then instantly turns back off (also spooky)
Twice the following has occurred while the PC is on: https://downloader.vip/ccleaner/ https://www.happywheels.vip/ https://vlc.onl/
Speakers start krackling as described above
Monitor frame rate plummets
Mouse loses power
This appears to happen at completely random times, and lasts for about 5 to 10 seconds.