Same problem as others - error message 8504.104 - but in my case it has stopped everything. Can't get internet connection so can't download removal tool. It won't start any process - won't uninstall Norton from any access point. It won't run the cmd - CHKDSK or FLTMC fixes because I have to be 'at an elevated level'. This is a Dell Inspiron 64 bit, running Windows 7. Thoughts??