I don't run a pirated copy of XP Pro or MCE. When they first introduced the validation tool on windows update my corporate keys were not working for well over 50 machines. After talking with MS and waiting for a call back i just went into IE on each machine and disabled the Genuine add on for IE. The updates now flow freely. I didn't know they were going to do this with MCE. Not a big deal just find MS to be hard to deal with alot fo times.