As with Windows 8 and 8.1 accessing legacy (Win 2k3 Server) file shares, Windows 10 requires a bit of tweaking. It is slightly different than Windows 8. Press the Win Key + rType regedit <enter>Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\ParametersCreate the following values if they do not existNAME: RequireSecureNegotiate TYPE: REG_QWORD VALUE: 2NAME: RequireSecuritySignature TYPE: REG_DWORD VALUE: 2Reboot*NOTE* RequireSecureNegotiate is of type DWORD in Windows 8/8.1 for both 32 bit and 64 bit. In Windows 10 64 bit you are forced to make it a QWORD. I have not been able to confirm if this is the case with 32 bit. It may in fact be a DWORD.