Windows 7 Home Premium doesn’t have the “Local Security Policy” console (aka : secpol.mmc). In order to access SMB share running the old protocol version, you need to enable the Authentication LAN Manager directly inside the registry.
Open the registry editor (Start > Run) :
regedit
Browse to :
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
Create a new DWORD value with the following properties :
LmCompatibilityLevel = 1