Mine doesn't work either, but it didn't before the update. M were very fast to respond and help, but it seems to be a windows problem. I have tried un-installing Control:PC etc but nothing seems to help. I use Microsoft Security Essentials; I tried un-installing that and re-installing Control:PC without Microsoft Security Essentials but that didn't do it. I turned my firewall off but that didn't help, so I am stuck!
I have looked at all the correct check/ticked boxes in msconfig and my firewall settings etc but I can't find anything.