Question Games Shutting down PC

Apr 8, 2022
2
0
10
hi, i'm new here and have a few questions my PC is acting crazy, it started over a month ago it just shuts down on certain almost all games i have now, took it to a pc shop and they had it for a week
got it back and all they said was it was just to dusty, so brought it home about a week after i got it, it started shutting down again, any help info would be great thank you!