Sometimes, iTunes users won’t open iTunes on Windows computer after they update their iTunes to the latest version. Worse still, some people run iTunes normally on their computer, but the iTunes can’t be opened suddenly for no apparent reason.

Just make a Google search with the keywords like "iTunes can’t be opened …" etc. you will find the most solution is to uninstall the current iTunes. But someone try this method, but they still can’t open the reinstalled iTunes on Windows. The most likely reason for this is that they didn’t uninstall the old iTunes completely.

Today, after checking the iTunes Technical Support at Apple.com, I summarize the steps of how to uninstall iTunes completely.

Step1. Open Control Panel and uninstall your iTunes and its components one after another as follow. And then restart your computer.

1. iTunes

2.QuickTime

3.Apple Software Update

4.Apple Mobile Device Support

5.Bonjour

6.Apple Application Support

Step2. Check whether the iTunes and its components have been uninstalled.

Generally, you will delete all the files belong to iTunes after step1. But it does not rule out that some files will be preserved probably. So, you need to see if the folders below have been deleted. If they still exist, you must delete them at once.

C:Program FilesBonjour

C:Program FilesCommon FilesApple

C:Program FilesiTunes

C:Program FilesiPod

C:Program FilesQuickTime

C:WindowsSystem32QuickTime

C:WindowsSystem32QuickTimeVR

Step3. Delete iTunes Plug-ins and Preferences files

Firstly, open "My computer" on desktop, and click Tool -> Folder Options -> View -> Show hidden files and folders to make all the files & folders viewable. And then delete folders as follow.

C:UserUser nameAppDataRoamingApple Computer

C:UserUser nameAppDataLocalApple Computer

After you uninstall iTunes and its components completely, go to Apple.com to get the latest iTunes and install it to your computer. If no accident, you will open iTunes on Windows normally.

Note: Before uninstalling your iTunes, you’d better back up your files in iTunes. Although iTunes has performed the backup automatically while synchronization, I still advice you to back up your iTunes music, movies, photos and Apps etc. by copying them to a folder on hard drive or other devices.