Very strange - I set up a new Windows 7 system and finally installed Outlook 2010 yesterday including Outlook connector. It opened and downloaded all my emails, folders, etc for my Hotmail account. I went to send an email and it stalled and was stuck on Sending/Receiving and finally it stopped with a connectivity error. I looked and the Network icon showed that it was disconnected. I thought my home network was having problems so I swapped Ethernet cables with a working computer next to it. The same thing happened. I realized that the connection worked fine until I opened Outlook. Bizarre. I am using it right now and it worked great until Outlook is opened, then it loses it's connection. I uninstalled Outlook Connector and reinstalled it twice, disabled most of the other add-ins, ran CCleaner, disabled/enabled the network adapter, and a few other things. I have solved some pretty trick connectivity/network issues, but this has me stumped.