The Solution: There is an old NT utility called SubInAcl.exe that can be used to reset permissions in Windows XP and also in Vista.
Step 1: Download from the link subinacl.msi
http://go.microsoft.com/fwlink/?LinkId=23418 and install it.
Step 2: Download my modified version of reset.cmd from the attached file here and save the file in 'C:\Program Files\Windows Resource Kits\Tools'
Step 3: Now type 'reset.cmd' and hit Enter (without quotes)
You will see the Command Line Tool running for some seconds. The issue should have been fixed and Quicktime should run again.
Bookmarks