My laptop has some pretty stunning problems with its USB ports. The devices (I usually have a mouse and a keyboard) do a lot of locking up and are recognized only sporadically by the machine. It's a real pain in the ass when gaming, and it's sometimes more temperamental than others. Just off the cuff, I'd imagine that the problems we're both experiencing are a combination of what Cynthetiq described (that USB ports just aren't the most durable things out there) and the fact that we're slowly frying our mobos because our laptops overheat. I don't think there's a quick, easy or inexpensive fix, unfotunately.
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