Presented By MaSTeR_MinD

Windows XP Media Center Edition:

Instalation Key: C82GJ-YH627-72GBT-R7XV7-M7Y4B; 
Upon first boot,
it will ask you to activate before you can logon.
click yes to activate. 
Select Phone option, 
select change Product-Key. 
Enter this key: XJM6Q-BQ8HW-T6DFB-Y934T-YD4YT;
select Update key. then select Remind me later.
Then After Loging run The Crack

Woolaa

Microsoft Sucks...:D

If U wanna Check 

@ Run type 
oobe/msoobe /a
& it will tell u dat windows is already activated