Windows 7 has the ability to link your Online ID with your Windows User Account. Currently, only Windows Live accounts work and I can’t see this changing in the near future.
What are the benefits of linking your online ID with your user account?
In the Control Panel window click, Add an online ID provider.
You’ll be taken to this site (http://windows.microsoft.com/en-GB/windows7/online-id-providers). Download and run the appropriate installer for your PC.
Windows Live ID will now be listed in the Control Panel window from before.
Click Link online ID.
Enter your Windows Live login details and click, Sign In.
The control panel window will now reflect your Windows Live ID and offer links to update the credential or remove it.
Click OK and you now have your Online ID linked to your Windows 7 user account.
Head over to the forums for assistance.