I'm having the same problem. I either need to (i) disable the firewall in order to access shared files on the remote machine, or (ii)check the "Use Default gateway on remote network" check box under New VPN properties-->networking-->TCP/IPv4 properies-->advanced-->IP Settings, but this of course disconnects me from the internet as it tells the internet browsers to use this VPN connection to connect to the internet and not the actual internet connection from the LAN.
Anyone has any clue will be appreciated, as I didn't have this problem with Vista before.
Thanks in advance