Deathwish said:No domain, workgroups. Usernames and passwords should have no effect on sharing of folders.
Yes they do. If you are accessing a machine with a different username and password then it will request that you put in the correct password for that machine and this can sometimes slow it down and make it look like the machine is doing nothing- it does it on our network even though that's on a domain but logged on locally

My bets are on him using his ISP's DNS servers to lookup machine names on his LAN hence it needing to access the internet. In your internet properties, assuming your router has DNS configured then you can set your primary DNS server to your router. Then again, that could be total bull because I'm just grabbing at straws

I await to be corrected
