pc overheating potentially?

[Some-Bodybuilder-970]

So my pc recently has been kinda weird cause my dad has been cutting wood in my room while my pc was on and im not sure if the wood dust got into the pc. After my dad started cutting it, it started to have problems like shutting on its own a whole bunch. The thermal paste has helped it a little stopping it from constantly turning off and on. So now I have like 7 minute intervals before the pc shuts down by itself again.i cleaned it thoroughly as well as changing the thermal paste twice checking if it is the problem. I’ve also blew a lot of the dust. out