Computer running fine.. come home the other night to Window cannot start because the following file is corrupt of missing c:\windows\system32\config\system I ran window recovery console, got things working, life is good. I wake up the next morning and the computer is stuck in a boot loop giving me a BSOD saying memory_management I run Windows Memory Diagnostic for ~3 hours on each stick of RAM, no errors reported Format drive, new install of windows, everything works, life is good. I come home from work and the computer is still fine, cool. I'll start installing my games/software again. Wake up this morning to Window cannot start because the following file is corrupt of missing c:\windows\system32\config\pci.sys (I think it was that directory anyway) I have another hard drive I could put in if needed, but I don't want to be wasting time fixing what isn't broke. Hard drive is my first guess but I'm also worried the PSU isn't supplying enough power or the RAM actually is fucked and I didn't run the memtest long enough. What do you all think?