My guess (since windows sucks at this stuff) is that its your windows box. Have you tried rebooting? Alternatively.... if you have mapped a drive from windows to PP, delete it and recreate it. Alternate alternatively, bring up a cmd window and type in "net use". This will show all your remote connections. If you see your pp connection listed in remote, remove it by typing in "net use /delete whatever_path_is_listed_in_remote". i.e. "net use /delete \\tormachpcnc\gcode"