Music Videos worse with every iTunes update

Question

I have purchased a number of music videos over the years. In the past they played fine on Windows XP. With every iTunes update, they've gotten more unstable, beginning with the inability to preview videos on iTunes. (The audio worked, but the image was pixilated). The actual video played fine on the computer and iPod).  With the next update, the videos in my library became unstable when played on iTunes, freezing and crashing almost every time (but still playing OK on my iPod).  During that time, I uninstalled and reinstalled iTunes and Quick Time countless times with no improvement.  One update eliminated the ability to stop the video and return to the library to make another selection.  If I touched anything, even "pause," iTunes would crash. 
With this latest update, I can't even hear the audio for previews on iTunes.  I actually purchased one last night without seeing or hearing it!
When iTunes gets up and running again, I'm going to try to authorize my laptop, but it's also Windows XP.  I don't have much hope that it will work for videos. It is beyond frustrating to have this problem for over a year with no Apple resolution.  I don't know if this is a chronic issue with Mac, but it has been for me.  Any ideas?  I have this totally useless library of favorite videos.

Answer 1

Same for me - once I enter the password in the first screen I 'cancel' the second request. Most of the time then things are ok - it is a pain but not enough to stop me from taking care of business.
MJ