I'm trying to set up a new laptop to join a HomeGroup on my desktop so I can share files over my home network. Got the password and everything seems hunky-dory on the desktop. However, the laptop won't connect to it - possible problems are:
a) clocks need to be synchronised on both machines (sorted that)
b) non-windows firewall in use (I've installed ZoneAlarm). How can I get ZA to allow HomeGroup?
c) ?

