I stumbled upon this page looking for a way to make my Pro/1000 MT dual-port adapter support vlan tagging in Windows 7 Enterprise.
I tried everything manual device driver install, setting gpedit.msc to allow newer drives, ProSet for Vista and x64. Nothing I could do would enable me to see those extra tabs labelled "VLANS" and other. Including some WMI launch service.
Through in a Pro/1000 PT into my PC, installed ProSet and voila, the tabs are there.
Just signed up to advise anyone else wading through all the materials to get this to work. Order a PT card and you'll rest well.
Now back to esxi 5.1 testing.