FlameOut

It's a friends computer, that I somehow got stuck trying to repair. I can't do a complete restore, I just needed to get it to boot up properly and hopefully get it back online. I get errors like no winsocks2 file, can't right click on My Computer to go to properties, and when I logon to the users account, there is no taskbar/Start menu! It's there when I log on as administrator. That is the biggest problem. How can I get the Taskbar to showup?

I have an OEM copy of Win XP Pro that I bought from newegg.com and I installed that onto my desktop computer. I have a (Dell) laptop that is also running XP Pro, but is pretty screwed up. Can I use my OEM copy to run Windows repair on the laptop? I won't be installing the OS, since it's already there. Repair doesn't ask for a product key does it? (There is one for XP Pro on the bottom of the laptop)