Skyhawker

I Think I found an answer!

I also had trouble with Silverlight in Vista..... then thought, I'm using the 64 bit version...

I tried opening up the 32 bit IE7 (in the All Programs menu) and Silverlight was working perfectly!!!

I know this isn't a perfect solution, but if you're using Vista x64, when visiting Silverlight sites, open up 32 bit IE7 and drag the icon in the address bar from 64 to the tab in 32...

 Works for me.

Skyhawker

 Well that's great for you (saying sincerely, not sarcasticly). I'm running 32bit Vista Business & IE7 as many other users having this same problem. I hope Microsoft staff are reading these posts and actively working on a fix/new installer.