Hello m8, dunno if you used a crack or not....but either way it looks like you are going to be forced to re-activate windows once the days run out. If you have a genuine key and still time to do this, then heres how to de-activate windows so you can enter your key... run regedit and navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\Current Version\WPAEvents find oobetimer entry and choose Modify. Change at least one digit to mess it up Next go to start & run option and type %systemroot%\system32\oobe\msoobe.exe /a This will bring up the activation box, choose the telephone option and click next, you will now see the option to change product key. Enter the key. If you dont have a valid code pm me i`ll see if i can help.
I have a problem changing product key in XP SP3 VL, i did what you told in the instructions but after changing some digits in oobetimer it still says it's activated?