Presumably it was showing as connected to your network. You could also check that Wireless Zero Configuration is running. Hold your Windows key +R and in the Run box type services.msc - click OK. Scroll down to Wireless Zero Configuration and make sure it shows Started
Just a thought - when you boot up your laptop how long do you wait to see if it will connect to the Internet? Somebody asked me yesterday why their laptop (Vista) wasn't auto-connecting, and in fact it was - they just were not waiting the 30 seconds it took to link up.
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