Hardware Monitoring on This Host is Not Responding

I received the following error this morning on my vCenter server after a brief reboot for a few Windows updates:

Hardware Monitoring on This Host is Not Responding

This error is generated when I click on the Hardware Status tab on each Host. I went to Plugins -> Manage Plugins disabled and re-enabled to no avail.

Came across this post at VMware Communities. Looked at half the suggestions and came to one indicating to restart the VMware VirtualCenter Management Webservices.

Microsoft Windows Service Pack Blocker

A blocking tool is available for organizations that would like to temporarily prevent installation of Service Pack updates through Windows Update. This tool can be used with:
Windows XP Service Pack 3 (valid until May 19th, 2009)
Windows Vista Service Pack 1 (valid until April 28th, 2009)
Windows Vista Service Pack 2 (valid for 12 months following general availability)
Windows Server 2008 Service Pack 2 (valid for 12 months following general availability)
Microsoft Download