I have Windows File sharing enabled on an OS X 10.4 computer. It’s accessible via \rudy\myshare for all the Windows users on the network, except for one guy running Vista Ultimate 64-bit edition.
All the other users are running Vista or XP, all 32-bit. All the workgroup information is the same, all login with the same username/password.
The Vista 64 guy can see the Mac on the network, but his login is rejected every time.
Now, I imagine that Vista Ultimate is has something configured differently to the Business version and XP but I don’t really know where to look. Any ideas?
Try changing the local security policy on that Vista box for ‘Local Policies\Security Options\Network Security: LAN manager authentication level’ from “Send NTLMv2 response only” to “Send LM & NTLM – use NTLMv2 session security if negotiated”.