I set up 4 different PCs. 1)running Windows 7 2)running Windows 7 3)running Windows XP 4)running Windows XP 64-bit Now, I can access and login between PCs 1 & 2, I can access and login PCs 1 & 2 from PC 3. Attempting to login to PC 1 from PC 4 fails but I can access and login PC 2. I receive an error message "Access denied - error code 0x80070035" when attempting to login to PC 1 from PC 4 without receiving a login / password dialog. What could be the issue?