Go to programs/ apps under the control panel and uninstall the app, then reinstall it again. Probably just a bad install. Also you can use windows media player to sync music (its better than the app on windows 7 for windows phone), and open the phone as a drive under the computer and drag and drop files as well.
thanks for reply, it wont even start as soon as you click install, install stops and spits out that error, so it never got installed at all there is no sign anywhere of a attempt to install, not in add/remove programs or anywhere i can find