The primary page could be (and likely is) loading from cache. To test that, get to some "top" page, like a newspaper or CNN or something with a clock, and refresh. Or go to somewhere you have never been, like www.purple.com. If you acn get to a page you have never visited, your internet is working. If you can't, you likely have an in house connectivity issue.

Click START, then type CMD and hit enter. In that black box that just opened, type

ping www.google.com <enter>

and you should see 4 packets sent and 4 received. If you get host unreachable, request timed out or anything other than 4 packets sent and 4 received, you are not getting out of your house.

Then try to ping 192.168.1.1 if you have a Linksys router or 192.168.0.1 if you have a Netgear or a D-Link. If you can't ping your own router, bypass the wireless by plugging a cable in and doing the ping command again. You need to determine if you are talking to your router as step #1.

S-L-O-W and can't connect are very different conditions. Once you determine if you are even getting out of your house, there is more.