Can't play purchased Videos on iTunes
It only fails when playing video purchased from the iTunes store.
To try and remedy the problem:
I have uninstalled/installed QT three times
I have uninstalled/installed iTunes twice
After each install, I can play purchased video for a short while and then it crashes.
As you can imagine, this is absolutely infuriating as I have just spent a considerable amount of money buying TV shows from Apple and now I can't play them!
PC, Windows Vista