I cannot unistall Quicktime in order to reinstall it.

Question

I cannot find the post where all of this was explained by b noir. I had the exact same experience as the person who was having trouble uninstalling Quicktime in order to reinstall it correctly. b noir suggested that the user get rid of ACE codec. What is that? Where can I find it? Would it be on my computer?
THANK YOU.

Answer 1

Have you installed any of the following:
ACE & K-Lite mega codecs package, QT alternative, Storm codec, WinAVI video converter, Mpcstar, (possibly starcodec pack, 3ivx, Xilisoft converter)
If so uninstall them, they are know to cause problems with QUicktime.
The packs normally come with an uninstaller, but I have never installed one myself so I don't have details.
Then download the version of Quickime without iTunes:
http://www.apple.com/quicktime/download/win.html
Now Remove Quicktime using the method for Quicktime in this article (just Quicktime):
XP
http://support.apple.com/kb/HT1925
Vista
http://support.apple.com/kb/HT1923
When you come to your C:\Windows\system32\ folder you can delete any file or folder with Quicktime in the name.
Restart you computer
Install the stand alone Quicktime and check if it starts.
If uninstalling Quickime fails, you need to delete the files and folders as in the uninstall method and then use the Microsoft Installer Cleanup utility to cleanup the Quicktime installer files.
Download and install Microsoft Installer cleanup utility, there are instructions on the page as well as the download. Note that what you download is the installer not the program – you have to run it to install the program. The installer doesn't give any message to confirm the installation.
http://support.microsoft.com/kb/290301/
(To run the program – All Programs>>Windows Install)
Remove any reference you find to Quicktime. If you don't see any look out for blank entries or numeric entries that look like Quicktime versions i.e. 7.x
Then try installing Quicktime.