Centrino, wireless modem problems

When I first got my dell about two months ago I was pretty satisfied with the overall computer, and I'm going to have to live with a coupke things. First my motherboard went bad, and next a pixel went out, now after a screen replacement I have another pixel that has gone out, it's two weeks old. I guess I'm going to have to live with a couple dead pixels, as I'm lucky that these dead pixels are off to the far left side of the screen. Well I'm posting because today I'm playing with my new stuff I bought at Best Buy. It's Saturday, and on friday(The day after Thanksgiving) I felt like I bought the best buy store, as I spent about 3000 dollars all on computer stuff. I'm begining to set up a wireless network in my household, and I've either been very good about setting it up or very lucky. It's netgear, and I'm running a B signal, as I only have DSL, and there is no real reason to go with th e g. The network is up and running find because my two regular desktop computers a sony and a dell are working fine, as the two have netgear stuff. The desktop dell is connected directly to the router, and the sony hooks up to the network wirelessly through a simple USB adapter. My dell 600m work computer is struggling however to work properly. Often the system freezes upon conecction with the wireless netowork, or is just plain slow. TOO SLOW, it takes about 15 mins to load up dell.com. PLEASE help!!!! suggestions would be greatly appreciated. AND you should drop by bestbuy yourself, the netgear stuff costed me twenty dollars a piece, the router and adapter, plus I got a Samsung Flat Panel 17 inch screen for a nice $220.