It seems you have no connectivity. On xp, it says, "limited to no connectivity"... however it means the same thing as no network access. ps Ive never used windows 7.
Anyhow, I would reboot router as that can rectify things.
You seem to have an ip address from what you wrote above, but do you have a dns address or default gateway address?
To find out do the cmd run and ipconfig/all
Its getting late here so try googling these.
How to set up dhcp client. how to set up tcp/ip
to obtain ip and dns automatically
If you google them, you should be able to sort the prob