I'm trying to configure Update Manager in vSphere 4.1U1 to download MS Security Patches so that I can create a baseline to keep my templates up to date. I went to the Windows Update site on my PC and copied that URL into Update Manager as a new Patch Source. When I click "Validate URL", it errors out saying "Note Connected". When I go back to the Configuration tab and click "test connection", the proxy configuration succeeds and connects to the Internet (rules out proxy or DNS issue).
The default patch source in UM for Windows patches is https://xml.shavlik.com/data. That patch source is enabled and connected, but there are no Windows patches in the patch repository.
What is a known good URL that I can point Update Manager to so that I can have it download Microsoft Security Patches?