By default the Windows 7 firewall prevents WMI (Windows Management Instrumentation) connections from remote machines. The following command will open up all the ports neccessary for remote machines to access WMI on Windows 7.

In a command window (cmd.exe) running as “administrator”, type:

netsh advfirewall firewall set rule group=”windows management instrumentation (WMI)” new enable=Yes

you should see a response like this:

C:\Windows\system32>netsh advfirewall firewall set rule group=”windows management instrumentation (WMI)” new enable=Yes

Updated 8 rule(s).
Ok.