Manually Removing QuickTime

Take the following steps to remove QuickTime:

Download and install the Windows Installer CleanUp utility.
Run this utility. It will show you a list of programs. Find QuickTime and remove it.
Go to the folder c:\windows\system32 and delete the files QuickTime.qts and QuicktimeVR.qtx
Go to the folder c:\windows and delete the files QTFont.for and QTFont.qfn
Delete the folder c:\program files\quicktime

Now all files belonging to QuickTime have been removed.

You can use the registry script below to delete all registry keys belonging to QuickTime.