I was applying SP 1 and it seemed to be going okay. Right at the end, it froze up. The dialog window said it was installing the helpctr.exe. Now it keep rebooting when I try to get it going. It comes up with the Windows XP Home screen and then when it goes blank and should display the sign in page, it reboots. I tried to boot in the safe mode, the last good configuration modes and it doesn't change. Earlier I had updated the Norton Anti-virus and scanned the hard drive. I turned it off when I was applying the updates. Unfortunately I don't have the XP Home disk here with me (its a friend's computer and she left it at home in another state). AN option would be to put XP Pro on the computer. Would it upgrade the XP Home? I would like to stay with the XP Home if possible.