Since you've got SCCM, you've got a domain - use group policy to configure the WU options to point to the SCCM server. Usually I disable WU though, because I'm using SCCM for patch deployment.
System Manufacturer/Model Number HP Z400 workstation OS Windows Server 2008 R2 CPU Intel Xeon 3550 @3.06GHz Motherboard HP Memory 16GB DDR3 Graphics Card Nvidia Quadro 600 Sound Card Realtek ALC262 Monitor(s) Displays 2x Hanns-G HG281 Screen Resolution 1920x1200
Keyboard Microsoft Natural Ergonomic Keyboard 7000 Mouse Microsoft Intellimouse Explorer 3.0 PSU HP Case HP Hard Drives 1x Samsung 160GB SSD
2x WD 1TB (RAID1)