Have not been able to login since 1.6.3 download

Something changed in 1.6.3 which seems to impact security settings in XP. Since the download, I have not been able to get in at all. I hang up at "Verifying Protocol Version" and then am taken back to the login page. I did not make one change to the PC or software. Before the download, I could get in with no problem. The download has now prevented me from logging in at all. I have uninstalled McAfee firewall and have installed SP 2 for XP. What else can I do?

make sure all your firewalls are off... even the windows firewall.. that should help.. sounds like your pc does not want to make the connection...when in doubt check your firewall..

Thanks. McAfee Firewall is gone. I cant seem to find the XP firewall settings or how to change them. My home portal router is set properly. It worked perfectly until the download!! LOL!!

The windows firewall should be located in your taskbar.. or you can access it via the control panel

After reviewing many posts, I tried installing SP 2. Guess what? Everything works now. Thanks for the help!