Not working for me either. Window 7 64-bit. Everything Apple is allowed through public and private Windows Firewall. I noticed that if I start the Bonjour service from the command line, then I start iTunes, it writes the following messages:
C:\Program Files\Bonjour>mDNSResponder.exe -server
Running service directly
ERROR: handle_resolve_request bad interfaceIndex 1ERROR: handle_resolve_request
bad interfaceIndex 2ERROR: handle_resolve_request bad interfaceIndex 3ERROR: han
dle_resolve_request bad interfaceIndex 4ERROR: handle_resolve_request bad interf
aceIndex 5ERROR: handle_resolve_request bad interfaceIndex 6ERROR: handle_resolv
e_request bad interfaceIndex 7ERROR: handle_resolve_request bad interfaceIndex 8
ERROR: handle_resolve_request bad interfaceIndex 9ERROR: handle_resolve_request
bad interfaceIndex 11ERROR: handle_resolve_request bad interfaceIndex 12ERROR: h
andle_resolve_request bad interfaceIndex 13ERROR: handle_resolve_request bad int
erfaceIndex 14ERROR: handle_resolve_request bad interfaceIndex 15ERROR: handle_r
esolve_request bad interfaceIndex 16ERROR: handle_resolve_request bad interfaceI
ndex 19ERROR: handle_resolve_request bad interfaceIndex 20ERROR: handle_resolve_
request bad interfaceIndex 22ERROR: handle_resolve_request bad interfaceIndex 23
ERROR: handle_resolve_request bad interfaceIndex 24ERROR: mDNSPlatformReadTCP -
recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)ERROR: mDNSPlatformReadTCP - recv: 10053
568: ERROR: read_msg errno 10053 (An established connection was aborted by the s
oftware in your host machine.)