Games For Windows Live and Halo 2

[Wedgetail]

I just bought Halo 2, and am having a great time playing the campaign.

Unfortunately, I can't play online. I have made a LIVE account but whenever I try to sign in, it says:
"Cannot sign in, Error Code 0x8015190a"
I've been to the official website and checked it, and in the list of Error Codes, it does not include that specific code.

I would really like some help because I'm a big online gamer and any help would be greatly appreciated.

[Jack.Sparrow]

Hello, Welcome to TSF.

I did a bit of looking around and found a few things.

If you have USB adsl, it won't work

I don't see how or why it matters what type of connection you have, but Microsoft works in mysterious ways.

Creating a new profile and setting your country to United States solves the issue

Xfire seems to be the culprit

If you have it, try turning it off.

Some people have also suggested adding another NIC solves the problem.

I don't know if these help you much, just some things to try as this seems to affect a fair few people and MS hasn't figured out what causes it