Click start then Run and type in msconfig. When the system configuration utillity appears click on the Startup programs tab. then find msmgs.exe in the list and click on disable. Then close the window. You will be asked whether you want to restart your pc now or later. Click restart now.
When your PC has restarted the system configuration utility dialogue box will apper click ok or check the box "Do not launch System configuration utility when Windows starts" and it shouldnt automatically sign in now.