“By design” UNC path browsing from the Windows Explorer address bar is not possible if the “Remove Run menu from Start Menu” in GPO is active.

The NoRun policy removes the ability to launch commands or processes from the Start menu by removing the “Run” option, but also removes the ability to enter direct (UNC) paths in the address bar of the Windows Explorer.

When browsing to a UNC path from the Windows Explorer address bar, the following error message will be displayed:
“Access to the resource has been disallowed”.

 

Solution

The error message “Access to the resource has been disallowed”, encountered when browsing to an UNC path (\\server\share), is a Windows security message. Users are not allowed to browse to UNC paths if the “run” command is not available.

The “NoRun” registry key has the value “1” if the “Run” command is not available. It can be found at:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] “NoRun”=dword:00000001

NoRun=1 -> run command not available
NoRun=0 -> run command available