Windows 7: Windows Live dashboard client rejects correct password

This horrible piece of software is driving me insane. Not long ago I changed my password to something with non letter/number characters, and from what I found out, you can't sign in with characters like that. Yet you can sign in to windows live's website. So after finding this out I changed my password to something that would work. Now I am able to log in to the Windows live site (or xbox.com) and the Games for Windows Live client, BUT I cannot sign in to any games that use the windows live client. (where you hit the home button and it drops down like the xbox dashboard).

So basically, I need to know if there is a way to wipe all the programs files or cache so I can sign in and play the games I purchased. I'm possitive that I used the correct password and username combination, but this terrible piece of software is stopping me from ever accessing any of my games again.

If anyone has any knowledge or input on this issue, I would greatly appreciate it. I already googled this problem, and it seems I'm not the only one, but I can't find any real solution.



Edit:

So I guess there is a way to delete profiles from the account. I had to remove it in order to sign in again and recover it. Don't ask me why it must be done this way, but it works again. Thank god.