I've resolved the problem with my intermittent lack of connectivity after a restart from standby. I've turned off ZoneAlarm and left the MS firewall on. I can't say I'm happy about that, as ZoneAlarm has served me well for ages and it does more than the MS one. I will wait for the production candidate SP 2 and then see if I can get ZoneAlarm working with that. Beware those of you who try RC2.