I seem to have a slightly corrupt MSN Messenger 7.5 as the sound has deleted itself so I get no alerts when messages are received. Trying to uninstal ready to reinstal but get message saying "patch package could not be opened. Verify that the patch package exists and that you can access it". Trying to instal from MSN webpage in the hope that it would uninstal the original, I am getting error message 1635. Help!!