Yes, I believe it was the Optimised BIOS defaults.
The reason why was that for some reason, I was getting BSOD's and that wast the only thing that stopped them.
As I stated, I mildly OC the CPU and it's been stable since.
W Index score comes up at 5.8, HDD giving it the low score.
I think that if anything, I have some sort of conflict when I insert the printer, most of the problems show up when it's connected.
I can't do a reinstall yet, but hope that'll sort it when I do.