Upgrading to XP

The Help Desk has decided the best way to upgrade systems to Windows XP SP2 from Windows 2000 SP4 is to take the computer to the helpdesk and put in a CD.
Who knows what kinds of problems this will cause in the future. I wish that these computers contained some sort of mark of the beast to indicate that they were upgraded in place rather than doing a clean install with a data restore. Compounding this bit of bad news is the decision by the largest Center to hold onto computers for a third year instead of doing a two year lease. That means these unholy computers will be in production longer.
I’ve found a handful of computers with Microsoft Virtual Machine installed. They are running XPsp2. We have no way of knowing if the users actually need this for some obscure product or if its a remnant from an upgraded Operating System.