All the four views are fucked up, cannot zoom, imported/opened models look transparent, wireframe is bugged, reinstalling didn’t help, installing a different version didn’t help.
http://filesmelt.com/dl/ms3d.png
http://filesmelt.com/dl/ms3d2.png
And it still worked yesterday.
Are you using the Aero theme thing on Vista?
I know that messes me up when I try to use a modeling program that the windows just go blank. Turning it off helped me. Install or do anything to your PC since it last worked?
No, I haven’t installed or added anything. Aero hasn’t been a problem earlier either.
You tried refreshing each window? Or re-installing?
Re-installed, didn’t help, installed an older version, didn’t help.
Might try refreshing the windows.
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Wait wait wait, how do I do that?
Right click, then either reset view or choose a new projection angle (doubt it will fix it though 
).
Didn’t help.