My iTunes stopped working the other day for what seemed like no reason. It had previously worked fine through numerous upgrades on my primary laptop running Windows XP. The error below started happening out of the blue without performing an upgrade or changing anything iTunes or Quicktime related that I was aware of.
I clicked on Start >> All Programs >> iTunes and received the following error:
Problem with Shortcut
This action is only valid for products that are currently installed.
Then I attempted to uninstall by click Start >> Control Panel, followed by double clicking Add or Remove Programs, highlighting iTunes in the list, and clicking Remove. The process started and then displayed the below error:
C:\Documents and Settings\NetworkService\Local Settings\Application Data\Apple\Apple Software Update\
After clicking Cancel the final error below was displayed:
The installation source for this product is not available. Verify that the source exists and that you can access it.
After a little bit of research on the Internet I was able to find that many other people have had the same problem and the easiest method to resolve the problem was to clean up the previous install and do a reinstall of iTunes and Quicktime. Follow the below steps and you will be using iTunes again in no time at all.
1. Close out of all applications you are running.
2. Download and install the Windows Installer Cleanup Utility. [located here]
3.Run the Windows Installer Cleanup Utility which will look like the below image. Highlight all iTunes and Quicktime related files and click Remove.
4. Download and install the latest versionof iTunes.
5. Launch iTunes and start enjoying your media files again.