回複：明白了...

多謝您。我想是當初壞的C盤沒拿掉，在第二個hard drive 上裝的 Widow XP OS. Then he found out that 還是不能正常運行window， 就把原來壞的C盤拿走了。剩下唯一一個硬盤顯示為E盤。

I will take your advice and not have any USB readers plugged in when reinstalling the window OS.

Thank you very much for your help.