help me, obi-wan kenobi: er, router problems

[rm]

So we have this router.
we got it hooke dup, and I'm, obviously, online.

When I log into the router it says Megan is logged into it too, but from her computer, despite saying she has an excellent signal, she cna't go anywhere. The troubleshooting guide seems to indicate she has tird party firewall software installed, but if she does she has no idea what (her Macaffee stuff is expired).

So what the hell are we looking for to get her online. The router, if it matters is a Belkin G.