Your library should be unaffected by these steps but there are also links to backup and recovery advice should it be needed. 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 QuickTime or third party software. Review the other boxes and the list of support documents further down the page in case one of them applies. 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. Should you want to bring things up to date howver, and have problems updating, then for general advice see Troubleshooting issues with iTunes for Windows updates.

Click Uninstall once and then again on the small popup that displays. That version is quite old now, though its fine if you don't have a device that requires a newer version for syncing or want to use the latest features. Go to PC Settings > Apps > Apps & features and find and select iTunes in the list on the right.

Download itunes windows 8.1 64 bit