Hi guys -- I thought I had this problem licked but it seems to have re-appeared again (probably after a Windows update). I have 3 computers on a Local Lan I'm testing Blackdog (Vista X-64), Redfox (W7 X-64) and Brownbear (XP Pro) The XP computer has no problems seeing / connecting to the W7 / Vista computers -- the W7 / Vista computers only see each other. Sharing etc enabled on all computers Here's the screenshots one from the XP computer, one from the W7 computer (same as the Vista computer) I've stopped temprarily AV software and firewalls --still can't see the XP machine from the W7 / Vista. What is a little frustrating is that this WAS working. BTW all 3 machines are connected via a WIRED LAN - no wireless involved. I've even disabled Wireless on the router just in case that was causing a problem. Any ideas anyone --XP seems to be able to hide itself from a W7/Vista network pretty well -- maybe a good hacking tool !!.