New Post: Patch My PC experience

Your WSUS is not up2date. The actually Build is .274. You need to install this Hotfixes:

WSUS 3.0 (SP2) + KB2720211: Build 3.2.7600.251
WSUS 3.0 (SP2) + KB2734608: Build 3.2.7600.256
WSUS 3.0 (SP2) + KB2828185: Build 3.2.7600.262
WSUS 3.0 (SP2) + KB2938066: Build 3.2.7600.274

After each Hotfix reboot the whole Server and control the Build.