A Vista PC used to be able to print on the printer connected to another computer (called 250gig, running XP), but now it can't find the printer. Perhaps it was caused by an automatic Windows update.
Another Vista computer can still print on the XP's printer, so I know the fault is not on the XP.
The Vista computer used to be able to explore 250gig's shared files, but now when I try to "explore" 250gig I get the message "\\250gig is not accessible. You may not have permission to use this network resource. .... The Server service is not started".
I found that the Server service _was_ running, but for good measure I stopped it and started it again -- no difference.
The settings in Control Panel \ Network and Sharing Center are:
Network discovery -- On
File sharing -- On
Public folder sharing -- On
Printer sharing -- On
Password protected sharing -- On
Media sharing -- Off
The user is an Administrator.
I would be grateful for any help. Thanks.