Windows Media Center Edition runs like crap

I recently installed WMC and it runs like crap. Whenever i scroll down a list it does the ghetto wave/section/not-fluent and pauses/breaks the window. I cant instal a critical update for it, i think becouse of SP 2 being intalled. any suggestions?

>>5 actually, I enjoy being able to download shit off of MS w/out being locked out by not passing their windows gunine advantage program.

Can't do that w/ ur shitty usenet ISOs, >>5.