I have 4 Sony laptops, a Seagate Central, 2 Wi-Fi printers and an iMac on my home network. The iMac running under OS X 10.10.3 can see all of the network devices using Finder. The laptops can see the iMac. BUT Windows on the iMac can only connect to the internet. Windows cannot see any of the network Laptops, the Seagate or the printers.
Apart from that Parallels works fine! I have emailed them for support but they have not responded. The machines are all networked via a Linksys XAC 1900 which works really well. I want to use the iMac as my #1 computer (it has more memory and disk than any of the laptops) but this network issue is making that impossible.