View shared files of a Windows 7 machine on a LAN
It is not reliable.
Sometimes making an RDP to that computer is needed before the share files can be accessed. Very strange.
A program may have to try accessing the shared files twice before the success.
Disabling firewall may help.
Tips from a Microsoft engineer:
First of all, please try to ping the machine both with IP address and machine name.
Try to use the IP address to access the machine`s shared folder from Windows Explorer.
Run the following command line to reset the TCP/IP stack.
ipconfig /flushdns (Clear the dns cache)
nbtstat -RR (release and refesh NetBIOS names)
netsh int ip reset (reset ip settings)
netsh winsock reset (Reset Winsock Catalog)
Reboot