Q: iTunes won't open even after uninstalling and reinstalling

Did you follow THIS Apple procedure document to completely remove iTunes and relates software components?

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

Note the additional steps (in your case) to Make sure that iTunes and its related components are completely uninstalled.

If Apple's instructions don't work for you then 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.

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, need to revert to an older version or want to try the iTunes for Windows (64-bit - for older video cards) release as a workaround for installation or performance issues, or compatibility with third party software.

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

Try Fix unexpected quits or launch issues in iTunes for Windows - Apple Support or try the detailed removal and repair steps here. If you have a 64-bit machine you can try the "for older video cards" version or one of the other recent builds.

tt2