It is a Windows problem and usually goes away with a new Windows installation. It is by no means a common problem, occurring only 3 times in the search of the MCH subforum.
Someone here also suggested that this was a group policy setting that blocked access to the network drive.
Some users will just use something like this with nbtstat to see the network drive. nbtstat is a TCP/IP utility that enumerates NetBIOS statistics and displays name tables for local and remote devices in a network.
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net use * /delete /Z
nbtstat -r
nbtstat -A ip_of_the_nas
nbtstat -a name_of_the_NAS
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