I recently installed Windows 8 Professional RTM x64 and activated it with a MAK Key. Whenever I try to add a key in VAMT 3.0, it shows the following error: After I click OK, I get a message saying that the Key has been successfully added to the list. However, it is not so & it is not visible, i.e. it does not get added. I don't get this error, though, when I open a .cilx file & all the keys in it get automatically added. It only comes when I manually try to put in the Keys. I have installed SQL Server 2012 alongwith VAMT 3.0 (for the Database) & have also googled around a bit only to find it is a known error with SQL. Does anybody have a workaround for this?