There's a specific way you should uninstall programs on Windows 10, and it involves going into your Apps and features menu. Here's how to do it.

To solve the “Another program is currently using this file” issue, perform a clean boot and try to delete the file. If it does not help, you may use a File Deleter software to delete locked files.

6. If you delete the key in which you've found the DisplayName key with the value equal to your program's name, then your program won't appear on the Add/Remove programs list.

It won't work through the command prompt either if another program has locked the file. To find out what program has locked a file, use WhoLockMe.