Well this is what i think happened, i think as of right now bitcomet is uninstalled except for the shortcuts on your start menu. What you need to do first is click on one of the shortcuts and make sure that they don't work. If bitcomet loads then you do have bitcomet still installed. The reason you are getting the uninstall error is because bicomet is uninstalled and add/remove programs believes that it is installed. So first go to my computer, then click on your primary hard drive (most likely C:) then go to program files, find the bitcomet folder and delete it. then delete the shortcuts off of your start menu or desktop. This will have completely uninstalled bitcomet, but it ill still show up in the add/remove programs file list. If this doesn't work i would try installing bitcomet again and then retry uninstalling it.