start > settings > control panel > administrative tools > local security policy > local policies > secuirty options > network access : sharing and security model for local accounts > classic - local users authenticate as themselves

start > settings > control panel > network connections > right click on your wireless connection > properties > make sure Client for Microsoft Networks is installed

both machines need identical user accounts with identical usernames/passwords

both machines need to be in the same workgroup

If all that is set then you should be able to see both clients in network neighbourhood