my os:xp updated from sp2>sp3 late last summer & i believe thats how the windows installer became corrupted which i've read can happen by deleting a folder/key.who knows. my 3 yr old custom pc did'nt come with an xp cd. i have a dell pc from 2003 that has an xp cd-sp1 that was never used. QUESTION: can i repair just the installer from this cd on my newer pc? and how would i go about it step by step. i read that you have to boot from the xp cd to start the process by changing the bios to boot from a cd first intead of the hard drive. is that correct? i ran "sfc scannow" but i did'nt see it finish, so i don't know what it found. THANX for your time\help.