John Rotton

Has anyone found an answer to this?

I'm having the same issue on both my desktop (Vista 32-bit) and notebook
(Vista 64-bit). Both of these are Domain members, and both have VMware
installed. After every reboot, Network Discovery is turned off. This is not
just an annoyance but a real problem since some automated processes run
occasionally that rely on the desktop being available for file copies, and
unless I check the discovery status all the time it's prone to failure.

Disabling UPnP on the router as suggested above had no effect. I've even
diasabled the Windows Firewall and still Network Discovery turns itself off.
Any ideas? Is it related to VMWare as suggested elsewhere?