pc 'x' can see shared folders on pc 'y' & 'z'. But 'y' & 'z' cannot see 'x'. It used to work, but after a power outage, 'x' became invisible. All pc's are xp home. It must have something to do with permissions, because 'x' can see the other pcs on the network. I have repaired the network connection, undone the sharing on 'x' and then put it back. What has changed?