I don't see what OS, what antivirus/protection and more importantly "the error message."
Rather than guess badly, reply to your top post with more details.
Bob
Hi,
I am trying to install Games for Windows Live but Windows live ID sign in assistant always fails to install and it says I dont have privilege to start system services. My user account is adminstrative because I can use admin tools. I cannot create a new user account because User Accounts does not open when i click on it in control panel. Please someone help me? I bought Grand Theft Auto 4 and cant play it because of this.

Chowhound
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GameFAQs
GameSpot
Giant Bomb
TechRepublic