How to fix You can't access this shared folder because your organization's security policies block
SOLUTIONS:-
GO TO RUN MENU
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters
RIGHT CLICK
CREAT NEW DWORK 32BIT
AllowinsecureGuestAuth
CHANGE TO ENABLE - IF DISABLE
NOW YOU CAN ACCESS ANOTHER PC FROM NETWORK
ENJOY :-