Gametap Installation & other problems

Hello all,

When I try to install gametap, (from http://www.gametap.com/reinstall) The
installer looks like it's going to work, but then halts. All I see is a
rectangle with part of the screen greyed out and 'squished' to the left. It's
almost the same as if the UAC is prompting me for something.

Has anyone else had any issues like this? Also, why does the screen 'squish'
to the left and grey out for the UAC? This seems like a graphics problem...

Thanks!