Every time i try to log on it says error 103. Please help!

Do you have any funky characters in your login name?

Try disabling your firewall.

Try waiting a bit then login again.

It is most probably caused by so many playing right now and trying to log in.

Have you tried repairing your install? Not sure if that will help you, but I had to repair mine twice in the past couple of days due to source file corruption.

I've tried logging in all day at various times (8-9 times today). This is the first beta I've tried (I bought the digital deluxe edition) and so far I can't check it out.

I tried disabling the firewall on the router and Windows.

Every single time I get an Error 103.

Is there another computer you're able to try it on? I know you'll have to sit through another install... but might give you a chance to play this weekend.