How do I uninstall Yahoo! Messenger? I can't use the program.
download CCleaner and undownload it there.... find it in your system right click it and delete
Try using Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.