" In short, the fan is responsible for keeping a computer's motor cool and this motor is what keeps the computer's hard drive and peripherals functioning the way you need them to, which translates to "fast." A dirty fan doesn't rotate fast enough to keep that motor cool and a completely clogged fan just stops rotating altogether. Although there are too many to list here, Windows provides more than a handful of useful utilities that will monitor system resources, organize files, repair damaged disks, and more. Yet and still, you can easily find similar tools for sale at computer outlets and download libraries. What's going on here? Sandbox devices are tools that come pre-loaded with things like calendars, calculators, and a notepad. What differentiates them from smartphones is that users can add (download and install) additional programs to smartphones and they seemingly become mini portable computers for the people who use them. The commands in a program are pretty useless unless they have some data to act on so programmers either give the programs some data to work with (list of names or numbers for example) or they make the program generate it's own data. Sometimes, the data comes from an outside source like the Internet or the computer that the program runs on. If we're not careful, we could end up replacing almost every hard and soft part of a computer that we own - all in an effort to upgrade! Upgrading in this fashion is not only silly to do so, it's also costly - more costly than simply buying a new computer. But once the decision to buy a computer is set in stone, what can be done with the old one? Schools can research student versions of commercial software or ask for a school discount. Just because school rates aren't advertised, it doesn't mean that they aren't available. Freeware or open source software (also described in another one of our articles) is another alternative to pirating commercial-ware, as well as shareware.