I have the same problem. The N810 maps the network drives on a PC running Windows XP with no problems. However, not so with a PC running Vista. I took 'yabbas' suggestions from an earlier post, but no luck.

I put all of my Vista sharing settings at the lowest possible security level. Still, no luck. (This Vista machine is so wide open that a guy driving by our house at 90 miles an hour running a Radio Shack TRS-80 can see all my files.)