Hi,
you need one more Update on your WSUS:
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
After this, reboot the WSUS and export a new Certifacte. Put in the GPO for publishing to the clients, edit one Update in WPP, publish again and try to install on a W7 Client.
you need one more Update on your WSUS:
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
After this, reboot the WSUS and export a new Certifacte. Put in the GPO for publishing to the clients, edit one Update in WPP, publish again and try to install on a W7 Client.