TeraStation suddenly cannot be mapped

[paitken]

We have a Windows network, a workgroup, with 4 computers (all Windows 7) and network-attached storage (a Buffalo TeraStation). All has been working fine for over a year. Suddenly, one computer on the network cannot see the TeraStation in order to map it. All other computers in the workgroup see and map the share, and the problem computer can see all other computers in the workgroup.

1) From the problem computer I can ping the share at its IP address 192.168.1.106 and I can access the share's configuration utility at http://192.168.1.106/cgi-bin/top.cgi.
2) When trying to map the drive, the Browse command does not see the share.
3) I cannot map it using its name \\TS-HTGL4A5\share or its IP address \\192.168.1.106\share. I get error 0x80070025 Network Path Not Found
4) Network diagnostics does not find any issues.
5) Network discovery and file sharing are turned on, password protection is off.
6) I turned Windows firewall off, no change.
7) I have tried rebooting the share, the computer, and the router, no change.
8) The Buffalo NAS Navigator can see the share but not map it.

THanks in advance for any help.