This is my first post. After searching the web for the last 2 days, I am turning to the community. I have a Mac based network in the office using OSX Server 10.3. All of the Macs (running no less than OSX 10.6) can see each other and share files. I have 2 Windows Vista machines that I had setup a mapped network drive to access files on the OSX Server. Both machines had worked for well over a year. I found out the other day, they no longer will connect to the mapped drive. Both machines have had the registry modified to change the LOCAL MACHINE/LSA/LM Compatibility to 1. This is what made it work the first time around. I can ping from PC to Mac and from Mac to PC just fine. OSX Server is set to the same workgroup. I have uninstalled the McAfee software on one of the PCs to no avail. Every time I try to map the same drive I get a cannot connect error. If I browse the network, the only things that show up are the 2 Vista machines. If I browse from the Mac side, only the Macs show up. If I enter the SMB address in to the connect to server box on the Mac, it connects. If I try to enter an address of one of the Macs on the PC, I get the same cannot connect error. 0x80070035, network path not found. Another weird thing is I can no longer print from either of the PCs to the network printers. I am stumped. Like I said, it has been working for well over a year. I suspect it is something in the OSX Server, but can't find anything that makes it work or there was some update to Vista that has hosed something up. Both machines are set to auto update. Any help would be greatly appreciated.