Quicktime won't open files

So I'm having a problem with a bunch of Quicktime movies I'm trying to watch on my computer. Every time I try to open one, it tells me Quicktime has encountered an error and needs to close. I have tried uninstalling & reinstalling quicktime (with iTunes, which is having issues of its own), but no luck. Any other suggestions?
Thanks!
Kaiti

I am having problems with my ipod,more specifically Quicktime, without it I can't sync... followed the recommendation from windows to remove and reinstall quicktime, now can't get it back. I have an icon on desktop with quicktime, one with ipod startup, and itunes, nothing works. I repaired quick time once, I downloaded it again, it still says on my control panel it is not there, just on my desktop as an icon..do you know how to get an icon to the control panel? I just assumed it did it by itself? this is amazing how much work this takes for 180$ music box, not including all the movies, songs I purchased.

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Quicktime won't open files

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