itunes won't install because it say it is already installed but it isn't

Hello,

This article addresses the issue you are seeing with reinstalling iTunes.

Remove and reinstall iTunes and related software components for Windows 7 and later - Apple Support

"In some rare instances, you might need to remove iTunes and related software components before you reinstall iTunes or install iTunes from the Microsoft Store. If you're directed to reinstall iTunes by AppleCare, an article, or an alert dialog, you can do so by following the steps below."

I hope this helps.

For general advice see Troubleshooting issues with iTunes for Windows updates.

The steps in the second box are a guide to removing everything related to iTunes and then rebuilding it which is often a good starting point unless the symptoms indicate a more specific approach. When reinstalling right click on the downloaded setup file and use run as administrator. It may also help to temporarily disable any non-Microsoft anti-virus.

Review the other boxes and the list of support documents further down the page in case one of them applies.

The further information area has direct links to the current and recent builds in case you have problems downloading, or want to revert to an older version if the current one won't work properly for you at the moment. Links to the most recent builds are now at the bottom of the page.

Your library and device backups should be unaffected by these steps but there are links to backup and recovery advice should it be needed.

tt2