Newbie in need of rescue!

OK. Brand new computer...Dell inspiron, 250...2000 whatever those numbers mean. anyway, we have a wireless hub in our house, Netgear brand, and my computer will run just fine on the internet if I plug directly into the cable modem, but barely runs the internet when its connected (directly) to the hub. We tried upping the security on the network so that vista might like it better and I disabled all the fancy graphics, and turned off all the protections...still no speed. :eek:
I am typing this on my old laptop because the internet on this computer plus the two downstairs are both working just fine.

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