I just upgraded to Windows 7, and now my toribash is running very slow, around 15 fps and refusing to allow shaders. When I was on XP, it ran at 60+ fps. All my other programs run as they did before (borderlands, HoN, guild wars, skype, xfire). The only problem is with Toribash.

I have also tried reverting to old versions, and that doesn't solve the problem. I also checked for driver updates on my graphics card, but the nvidia site is down at the moment.

Help :[

try going to the FAQ sub-forum, they have information about Windows 7 with shaders.

It should work now.
Check it, gett he latest drivers (windows 7's default drivers might be direct x based instead of openGL, that's probably the problem)

Thanks. fixed