I have a few PC's that we acquired second-hand. They both have XP Pro COA's, but the HD's were formatted when I got them, and I didn't have the recovery CD's (Acer AcerPower F2's), so I used a generic product key to install XP Pro thinking I was covered by the fact that I have legitimate COA's if there was ever a question. Well, now that Microsoft has deployed their Genuine Advantage update, I am getting notifications about being a victim of piracy.
I tried to change the product key using Microsoft's described method (http://support.microsoft.com/kb/328874/en-us
but the system is not accepting the product key listed on the COA. In doing some research I have found out that the key listed on my COA is probably for the corporate release of XP, as opposed to the retail release (it does not say "OEM Software" on the COA), but I haven't been able to get it to work with either release.
I believe we are legitimately covered by the license that was originally included with this machine, so I need to know how to get this up and running legally. Any ideas?