I've been on the forum for weeks trying, like many others, to find a solution for the networking failure. I've tried EVERY suggestion, more than once or twice, and I've been very close to just do the ugly re-boot(camp)ing thing. I think Parallels Desktop is a terrific piece of software, and I really couldn't understand how the makers could be failing so horribly. And now it turns out that, at least in my configuration, it's really not Parallels' fault. So what did I do? I turned off the Kaspersky security. Completely. And my XP is back online!! Of course, if you have self-assigned IP-addresses or similar trouble, you'll have to fix that first - as described in multiple threads here - but to me the correctly assigned IPs still didn't mean that my VM was networking. But now it is. I'm assuming that Kaspersky is still partly useable, it's probably just the firewall part that's causing the problems, but I decided on drastic measures. I'll r-implement Kaspersky step-by-step to see what will happen. I really hope this will help some people, since I know how frustrated you all are.
Strange thing, though, is that in OSX Network Preferences, both Parallels-related items are switched OFF. (I forgot to turn them back on after the umpteenth try). I can now confirm it IS just the Kaspersky firewall causing trouble. Evrything else is back on. And I am running Parallels release 5600, by the way, without hassle.
seems like you figured this out all on your own. is this forum really useful? seems like lots of questions, but few answers. does parallels even look here?