I have played around with fork on WinNT. It is advertised as a beta feature, and I strongly suggest that you take them at their word. While programming my chatterbox client, I initially tried this new fork() feature, but it wouldn't work for anything but the simplest forks. I couldn't isolate the problem, but I suspect that it is related to certain modules not being "fork" compatible, or perhaps socket problems such as Corion had described above.

All in all, I'd suggest not using this for production work and look at it as a curiosity. Hopefully, features such as fork (and alarm!) will be fully (and reliably) implemented.