today I updated QuickTime to version 7.1.6 and encountered the following problem. Apple Software Update application identified I had to update to 'QuickTime and iTunes 7.1.1' (which I did a week ago, but was not sure). After launching the application the updater installed QuickTime 7.1.6; so 'QuickTime + iTunes 7.1.1' were correctly installed a week ago after all. During the installation the update tried to find the 7.1.1 updates, an operation I had to cancel manually.
The problem is that the Apple Software Update application remains displaying a message to install 'QuickTime + iTunes 7.1.1' whereas even QuickTime 7.1.6 is already installed. So the update application is somewhat confused and I am not sure it will identify the correct future updates. Emptied the folder C:\Program Files\Apple Software Update\Packages, but this dit not solve the problem.
Cleared all temporary folders (C:\Temp, C:\Windows\Temp); did I forget any? Anyhow, it does not help. Neither does a reboot.
Windows Install Cleanup Utility, only displays QuickTime 7.1.6, which is correct.