Blue screen of death after the MBR boot code is modified

Case:
The customer’s maintenance of the computer is a blue screen. It is a blue screen when it is turned on to skip the BIOS detection item. The hard disk is normal. After entering the PE, the hot -hanging hard disk is also blue screen.

Solution:
After getting me here, I hung PC3K normally without errors, and it is OK to enter, and I feel very strange, so I opened it with Winhex and found that the obvious MBR was different from the normal MBR, so I copied a normal MBR446 wordAfter the section covered over the past, restarted, everything returned to normal.