Do you have the WAT update installed, KB971033? If yes you may have got flagged as non-genuine, in order to become genuine again just do the following.
* Launch the loader application and select to uninstall
* Restart the PC
* Install the loader and restart the PC
* Visit the following website to revalidate Windows: www.microsoft.com/genuine/
Is Windows failing to boot after you installed the loader? Just do the following.
* Boot up the PC from your Windows installation disk
* Select the "Repair your computer" option
* Select "Command Prompt"
* Input "bootsect.exe /nt60 SYS /force" (without quotes)
* Restart the PC
New in Version 1.8.7
* Added a new GRLDR version
* Added SLIC detection with a dumpving feature (Used to check if a SLIC is valid)