I have 2 Macs (OS X 10.5.8) and 3 Win XP PC's on my home network. Up until recently the Macs had no problem seeing and sharing files on the Win PC's. Now all of a sudden the Macs cannot see the PC's anymore. I've rebooted all of the computers and the router. I can ping the PC's from the Macs. I've tried turning off the McAfee firewall (the Win firewall is already off). I've tried rerunning the Win Network Setup Wizard. No luck so far.