Hiya, This computer is locking up for around 5-30 seconds before throwing Blue Screen of Death's with 0x7A and occasionally 0xF4 errors. The log files don't really show anything informative, and Windows Update doesn't show any new drivers for the HDD. Upon restart, it shows a "A disk error has occurred /n Press Ctrl+Alt+Del to continue", and to fix this I go into WinRE via the pendrive and run "bootsect /nt60 C: /force /mbr" and that seems to fix it so it boots. And then the cycle repeats.
If you want any more information please ask.