My last two laptops were HPs and I've loved both of them. However, expect lots of crapware from an HP. Both of them had a bunch of programs that just waste space. That whole formatting the harddrive idea mentioned above isn't a bad one. On the plus side, my first HP laptop lasted 5 or 6 years before I replaced, and to be honest, if I bothered to track down all of the system disks and did a good reformat on it, it would probably still have a year or two left in it.
My current laptop is only a little over a year old, but the past 7 months or so I've been in Iraq, and it's held up quite well. Given the heat (occasion power outages kill the a/c, making the room an oven of sorts...) and the sand that seeps in through the window and coats everything, I'm surprised, but it hasn't crapped out on me yet.