The release of Windows Vista Service Pack 1 removed
loop-holes that enabled anti-activation utilities such as Grace Timer exploit
and that Paradox OEM BIOS Activation crack.

Also, Microsoft now issued a separate "Update for Windows Vista (KB940510)",
which is a 3 MB sized file that will check your (non Vista SP1) Vista installation for the presence of the Grace
Timer exploit or Paradox' OEM BIOS activation crack.

The full story is available over at Tech ARP .