csamuels,
You're right, thanks for your reply. The thing that was confusing me was that I tried linksys' updated driver that was specifically supposed to address this problem, and it did nothing. Don't know why, but recommended they buy newer adapters and get up to speed.
So to anyone having the same problem, the problem lies either in your NIC driver (search for an newer one on the manufacturer's website) or you need to update Windows (which you should be doing anyway!)