I've installed windows 7 home premium 32 bit and some of the mpg files on my harddrive do not have thumbs but play fine, but they do have thumbs in media centre. Also the desktop wallpaper option to stretch, centre, tile etc doesn't do anything. I didn't have any of these problems with vista or a fresh install of windows 7 rc. After being pleased with the rc which i used for months i just didn't expect these issues.

Hi erratum1,Regarding Question #2 (desktop background problem), do you have a HP computer per chance?Ramesh Srinivasan, Microsoft MVP [Windows Desktop Experience]