Dust is a leading cause of heat buildup, because dust traps heat into one place. Because dust collects near your components, the heat of your components stays nearby your components. This generally causes an increase in your components' temperatures.
High temperatures can cause computer failures as a measure to prevent the hardware from becoming damaged. You'll be more glad your computer failed at 110C, where you can then fix the problem, than if your parts began to melt at 150C.
You should regularly clean your computer (mainly redusting; sometimes reapplying thermal paste) and check to make sure all your fans are working (be sure to check your PSU's fan(s)!). You can schedule checkups every month or two months. More frequent checkups are generally unnecessary unless you are experiencing major problems (in which case you should check to be sure your case is assisting in your fluid flow and that your fans aren't pulling air from a bucket of dust, for example).
answered Jun 06 '10 at 22:03
Not the leading cause of computer failure, but it is a contributing factor.
answered Jun 06 '10 at 21:42
yes it can overheating is never good and can be really bad for your computer
answered Jun 06 '10 at 21:43