Fissurez
Puzzlemaster
try installing the latest versions of the .net framworks
http://www.microsoft.com/downloads/en/details.aspx?familyid=9cfb2d51-5ff4-4491-b0e5-b386f32c0992
http://www.microsoft.com/downloads/en/details.aspx?familyid=333325fd-ae52-4e35-b531-508d977d32a6