So, I tried Windows forums and help sites... And... No, just no. Here's the deal: Xmas. At my parents. Previously: 2 XP computers and a printer. Worked. NOW: 1 Win 7 laptop. WIFI, can't see anyone else on network. Windows firewall on, Avast! installed but off Edit: but can ping XP and connect via \\xp\backup to find that folder.. 1 XP, with printer. WIRED to router. Can see but not connect to Win7. Windows firewall on, McAfee installed but firewall off 1 MacBook (2007). WIFI. Can see both windows computers but not connect to either, can also identify printer albeit not make it print. No firewall or antivirus (duh) Edit: MacBook can now connect to XP. But not print. NETGEAR router. Canon MP540 printer. How the hell do I get these to play nicely together?