Usually, I have my data backed-up on a external HDD and everything, then I decided either:
A) Use the built in system recovery console, format and repair, then start restoring files.
B) Replace system recovery console with DVD recovery
If I didn't had my hard drive backed-up then I'll just extract the HDD, put it on another computer(By slave or by enclosure) then access any data there.
I think I might have been doing a couple too many things at once, because my computer got super slow, then I got the blue screen of death, I didn't see the errors though, and it restarted but didn't get past showing the CPU on the black screen with white writing, I can't enter BIOS setup or anything. Any ideas?