i kept getting the error up when trying to run this tool. tried various things from others posts then did what i'm about to explain and it worked a treat.
- instead of running the tool save it to your desktop (or wherever you want so long as you can find it again)
- right click on the icon
- now select properties from the pop up menu
- click on the digital signitures tab along the top
- now choose the signiture in the box below
- click details
- then click veiw certificate in the new box that pops up
- now in the next window that pops up click on install certificate
- now you'll have an import wizard click next
- now leave the selection on automaticly chosse where to put it
- now click finish
- confirm the succses (click ok)
now try the product key update tool again and it should work.
hope this helps
ta dave