When it comes to the bios settings of the motherboard i'm unsure if it's trying to overclock or not.. There's so many bios settings that it gets confusing. I've avoided changing anything in there and everything should be set to default.
I've monitored the temperatures of my PC and it i think it's safe to say its not overheating.
I've checked my drivers
and updated the latest drivers.
BIOS is up to date.
I have not used memtest86, i will try this.
When it comes to Step 7 and says to do a "vanilla" re installation i can't really test it because the only time my PC crashes is when downloading from steam or a game launcher for example.
I've already had my PC opened up previously and cleaned any dust that was in there.