现象：一次断电后再启动时，进XP未到滚动条就出现黑屏，左上角光标在闪，一直保持，无法进入系统。 解决：
1. made sure ACPI, Plug & Play, USB all enabled in BIOS
2. moved mouse from the ps/2 port to the first USB port
3. booted using safe mode
4. waited until it hung at Mup.sys
5. removed the mouse cable from the USB port
6. (3 seconds or so pass, the screen went black and safe mode appeared)
7. restarted system
8. booted normally into XP Pro
