Tried running as admin as per some forum discussions about this problem but no luck. I haveWindows 7 64bit. The problem only started after I downloaded new version of Quicktime in February 2014.
I have the same exact problem since the update. The problem seems to come from Quicktime itself as I can open .mov files in other players. Tried re-installing it, even cleaned cache and temp files in between. Running as admin has not helped.
Hope this gets an awnser soon.
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