This is also why I buy higher-end Dell laptops. In fact I'd suggest to anyone inclined to see what life they can get out of their hardware, before buying a laptop, see if you can find the service manual online. My current laptop is at least 5 years old now and going strong. Battery life sucks, of course, but that's just a constant for the age of the laptop. I've had to replace hard drives (easy), get a total air-flow-blocking dust bunny out of the fan (service manual was quite helpful, that involved near total disassembly unfortunately), and replace the keyboard. While I could theoretically blunder my way through the latter two, it's nice to have a manual telling you exactly what to do, so you do only and exactly what you need to do. (Every laptop I've had has been different in terms of what you access from the top and the bottom.)