this solved it for me!
http://discussions.apple.com/thread.jspa?messageID=13353825#13353825
"Same problem. I'm running itunes 10.1.2.17 under win 7.
Here's what I did to fix the problem. Basically you need to create a new exception in your firewall to allow itunes UDP communication.
control panel>system & security>Windows firewall.
Advanced settings>inbound rules
New Rule> Program > browse to C:\Program Files (x86)\iTunes and pick itunes.exe
Allow the connection>next>next
Give it a name like iTunesUDP.
Now click on your new rule "iTunesUDP" and select properties.
Click the protocals and ports tab.
under protocal type select UDP.
That should do it.
Let me know if it worked for you. "
I created two of these, one for UDP and one for TCP. Some users reported that both are needed to make it work
http://discussions.apple.com/thread.jspa?messageID=13353825#13353825
"Same problem. I'm running itunes 10.1.2.17 under win 7.
Here's what I did to fix the problem. Basically you need to create a new exception in your firewall to allow itunes UDP communication.
control panel>system & security>Windows firewall.
Advanced settings>inbound rules
New Rule> Program > browse to C:\Program Files (x86)\iTunes and pick itunes.exe
Allow the connection>next>next
Give it a name like iTunesUDP.
Now click on your new rule "iTunesUDP" and select properties.
Click the protocals and ports tab.
under protocal type select UDP.
That should do it.
Let me know if it worked for you. "
I created two of these, one for UDP and one for TCP. Some users reported that both are needed to make it work