Whenever I connect to XBOX Live the game stutters and freezes in the main menu. Sometimes it even crashes.

By deactivating fullscreen mode i was able to monitor process load in task manager. Whenever something related to XBOX Live is done (Settings, loading realm) the processor load for "Web Account Manager" wents up like hell, killing my old Laptop.

The Connection to XBOX Live service is perfect. I attached Screenshots and a crash log from event manager.

I stopped several apps and services like steam, skype, adobe, itunes... to free ressources.