Hmm, the only time i had the (!) was when i imaged the Windows 7 machine before i finished the host name and time setup (Fresh from Dell laptop, its the finalizing the windows setup). After i named the host proper and booted into windows, it went to just the red bubble.

I too am having this issue. It is a Windows 7 Dell Latitude e5420. I have spent a few hours smashing my head against this. During 1 of my 100s of google searches, i did find a post from someone saying this only effects Windows 7 PCs it seems. I am still testing this so i have not been able to use this on an XP machine yet. i opened every possible thing i could to the Windows firewall to allow ICMP, UDP, and TCP through both inbound and outbound connections. No dice. Only disabling the firewall would allow it to connect. UAC wasnt a factor.

I eventually fired up Wireshark to see what was going on. With the firewall off, i can see the reply going out from Windows 7 laptop to the FOG server over UDP with the destination port of echo(7). With the firewall on, ICMP, UDP, and TCP open on both inbound and outbound, this packet is never sent.