回复：一不小心,装两套XP.如何删除一个?每次开机提示要选一个.烦!

You can not unless you format you hard drive, but there is something you can do to avoid the trouble at start up.
Edit your boot.ini file, run-> cmd -> msconfig ->boot.ini, you will see two Windows XP here, delete the one you are not using, make sure you know which one is which