I have had Windows Media Center running for about 2 years. Now for some reason I can't shrink the window - it either runs in full screen mode or completely minimized. I can't run in the small window.
This may be relevant - I recently 'ghosted' my hard drive to a new drive. Everything else seemed to work fine - I was not asked to reinstall any drivers, etc. However, when I went to launch Media Center I was asked to set up my TV Guide again. Then when it started working, I had this problem with the Window size.
This is very annoying, as I typically use Media Center to play TV in the small window while I continue working (more or less) on the rest of the screen.