Windows 7蓝屏自动重启，无法修复，做系统还原时错误代码：0x8000ffff，蓝屏时错误代码：0x0000007B，此时如果用PE盘启动，硬盘中所有文件都在而且可以正确读写。

原因是BIOS中，sata类型在AHCI或raid或ide之间有修改。

处理办法：

1.Boot OS DVD

2.Choose the Language Selection.
3.Choose Repair.
4.On the recovery tools choose the Command Line Console
5.Type:regedit
7.Highlight HKEY_LOCAL_MACHINE
8.File > Load Hive
9.Select \Windows\System32\config\system (Backup this first, it's advised)
10.Regedit will ask for a Key name: Name it something like "temp"
11.Located HKEY_LOCAL_MACHINE/temp/Select/Current
12.Searched for every key containing the value “SCSI Miniport” where the "Start" value was a "3" and changed the "Start" value to a "0". (F3 to search next result).
13.Highlight "temp"
14.File > Unload Hive
15.Restart
16.Enter into your OS

其中的三个主要的键值中的Start要改成0，不要遗漏：

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\pciide

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV