In reply to mypyrex:
Add/Remove programs is not strict. Its is only a list of applications which have registered themself and the location of their uninstall file. This can become out of sync, and commonly does. If you delete the folder, or uninstall the app from the start menu or a variety of other reasons the link in Add/Remove can becomes dead.
Look in your Start Menu for a directory with the name of the app your uninstalling and look for an Uninstall or Remove icon. Failing that go into your C drive and then Program Files and then a directory names for the application and look for an uninstall or remove icon. Failing that you can run the application installer again and it can give you an option to reinstall, repair or uninstall. If it only gives you a install option then install it again, and then uninstall it.
Don't burn your house down to repair a broken cup.