WSUS Client Diagnostics
This tool has been designed to aid the WSUS administrator in troubleshooting the client machines that are failing to report back to the WSUS Server.
The tool will do a few preliminary checks and test the communication between the WSUS Server and the client machine.
Once the tool has completed the tests it will display the results in the console window. The WSUS administrator also has the option to have the results logged to a file in addition to being displayed on the console.
Download : http://download.microsoft.com/download/9/7/6/976d1084-d2fd-45a1-8c27-a467c768d8ef/WSUS%20Client%20Diagnostic%20Tool.EXE