My home has four computers set up to share files & printers via a Windows 7 homegroup. Two computers are running Windows 7 Home Premium, and the other two are running XP Home. Everything works as expected with three of the computers. On the fourth, it is a one-sided conversation. The problem lies with one of the XP machines. Everyone in the homegroup can see his files and use his printer. He can see everyone but can only share files & printers with the other XP box. When he tries to see what is on a Win 7 machine, a “not accessible… you might not have permission message…” pops up even though the Win 7 machine he is trying to see has two shares (one requires password, the other does not) set up for the sole purpose of allowing XP boxes access to the homegroup. The network/work group settings on the two XP boxes appear to be identical. While I think there is a simple solution to this problem, I have yet to find it. What am I overlooking?