http://msmvps.com/blogs/athif/pages/43219.aspxAutomatic Update Client Stuck in AU STATE# 4 In this Article, I will explain, why Automatic Update Client Stucks in AU STATE# 4 and doesn’t installs the updates. To see the AU State, you can run a simple Reg query from command prompt; You can downloadenCommunityServer 2008.5 SP2 (Build: 40407.4157)