Apple Quicktime Error -1856?

So, since I upgraded to Windows 7, I cannot open ANYTHING in Quicktime. I get this error when I try to play a video, "Error -1856: an unknown error occurred." Its really frustrating seeing how alot of files run only on quicktime. I have uninstalled and reinstalled Quicktime 3 times and uninstalled and reinstalled iTunes once and nothing will fix it, iTunes works fine and videos will play on it flawlessly. I would greatly appreciate it if anyone could help me get passed this frustrating issue.

Thanks!

p.s. Once researched on google, a few people said it might be a registry error so I have run CCleaner and still no fix.
 
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