LPent

Oops I was a bit quick to think I had solved it. The problem is here:

Go to administrative tools > firewall with advanced security.
Click "inbound rules" then on the right "filter by profile" > "filter by private profile"
Next find all the "Network discovery ..." items. You will see that the SSDP-In and the UPnP-In are not enabled.
When you enable these; network discovery will automatically turn back on again. Unfortunatly after a reset or a reboot, they turn back off again. When you double-click these items it says "this is a predefined rule and some of its properties cannot be modified" I am not sure this is why it keeps turning off.
If someone knows to to make the "enabled" option permanent I would be much obliged.