I have discussed this problem before but still never solved it. It is very frustrating. I have several computers on my network. My computer can see them all and access them all, but they can see me but cannot access mine ! I have disabled Norton and firewall. I have shared my computer. What Have I missed ??????
What versions of Windows are running on the machines? FAT32 or NTFS file systems ? Remove all the networking protocols etc from your problematic machine, blank out the workgroup/domain, reboot, set it all up again and try to reconnect. If XP make sure Enable NetBios over TCP is checked under TCP/IP Properties/Advanced