xp 改機碼
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot
Under SafeBoot, you should now see Minimal and Network. Click on them and hit F2 to rename them to "Minimal-" and "Network-", respectively.
This should cause Windows to crash the next time it is booted into Safe Mode."
windows 7
http://www.disablesafemode.com/