Help - Can't Play Movie in iTunes 8

[bildio]

My PC uses XP SP3. As soon as I start a movie in iTunes 8, iTunes stops running. I was able to play movies before I upgaded to version 8. Also, when I open QuickTime, it displays loading, and stops running. I uninstalled & reinstalled iTunes & QuickTime, and still have the same problem.

Any ideas on how to fix?

 

[Tallest Skil]

What does the crash window/report say?

 

[bildio]

szAppName : iTunes.exe szAppVer : 8.0.2.20 szModName : hungapp
szModVer : 0.0.0.0 offset : 00000000


C:\DOCUME~1\COMPAQ~1\LOCALS~1\Temp\WER5e82.dir00\iTunes.exe.mdmp
C:\DOCUME~1\COMPAQ~1\LOCALS~1\Temp\WER5e82.dir00\appcompat.txt

 

[bildio]

I think I found the problem. "Playing videos purchased on the iTunes Store requires an Intel Pentium D or faster processor". The PC I'm using has Celeron processor. Now if I'd could find an earlier version of iTunes, I might be able to downgrade iTunes, & play videos.