Recently a customer of mine was experiencing problems with WGA under Windows XP with SP3. Upon boot-up and login WGA some of the PCs would state that the Windows installation was not legitimate. This was odd as I had recently reinstalled Windows XP on these machines with the correct volume license key. Comparing the actual product key (using Belarc Advisor ) I found that it differed from what it was supposed to be… very odd. So how to remedy this? Here we go: Step 1: Start | Run | regedit Go to: HKLM\Software\Microsoft\Windows NT\Current Version\WPAEvents Right-click OOBETimer and choose Modify Change at least 1 digit of this code Step 2: Start | Run | %systemroot%\system32\oobe\msoobe.exe /a This runs the activation wizard. Choose Yes I want to telephone… and hit Next Choose Change product key I entered the correct product key and hit Update Choose Remind me later I think a restart was then required… can’t ...