until it will be fixed try to set Screensaver to a higher value or you could disable it
if so, the bug on the screensaver is the culprit for not being able to access the machine thru NAS? I will try tonight and feedback if this fixes the problem.
How about defining a DOMAIN in the router and in the PC (WIN7), will this help? Right now, my homegroup is set to off but I renamed my workgroup to a different name (same to all my PC and mede8er). But, on the network connection settings, DOMAIN needs to be defined. Do you think this will help?