Category Archives: security

Windows XP SP3 wsus client not updating

When you run the WSUS Client Diagnostics Tool, you get the following error at the end :

WinHttpDownloadFileToMemory(szURLDest, NULL, 0, NULL, NULL, NULL, &downloadBuffe r) failed with hr=0x80072efd

A connection with the server could not be established

In addition, your WSUS server is most likely not configured to listen on port 80.

In my case manually updating the WUAgent to v7.4 (x86 | x64) solved the problem.

I suspect the client is trying to execute a selfupdate but this fails because the WSUS server is not responding on port 80.

Disable UAC for Windows Servers through Group Policy

In Computer Configuration | Policies | Windows Settings | Security Settings | Local Policies | Security Options configure the following values:

– User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode
– User Account Control: Detect application installations and prompt for elevation
– User Account Control: Turn on Admin Approval Mode

Source.