Unable to Uninstall QuickTime for Windows. Says “Rollback Action”
Posted on Feb 15, 2008 under Software Tips |When playing trying to uninstall QuickTime for Windows, you instead get a Rollback Action message and you are unable to uninstall it.
To solve this problem try the following steps:
1. Click Start > Run and type %windir%\system32. Click OK.
2. Delete the QuickTime folder
Delete the files QuickTimeVR.qtx and QuickTime.qts
3. Go back into Add/Remove Programs and try to uninstall QuickTime. You should be able to now.

by RG, on March 23 2008 @ 6:01 am
I tried the above (Vista) and still unable to delete.
by Art, on April 7 2008 @ 2:27 pm
I’ve been trying to dump the latest version of Quicktime for days and nights so I could install a prior version hoping it might actually work. This suggestion helped on XP. The uninstall never finished right until I deleted all quicktime directories in all user and the active user folders. But even though the uninstaller ran to completion the prior version refused to install. In the registry I found an Apple update entry with version info which I renamed. Even so I could not install a prior version until I hit this suggestion. Thanks. ANd the prior version (7.2) actually works.