It's a good idea to leave the computer off for several hours, or preferably overnight, to allow the cathode ray tube to discharge before opening up these models. In fact, some models include no instructions at all, and the owner's manual actually discourages you from taking any self-help steps. But don't spend money on screen wipes. These are actually common, and can destroy a computer in milliseconds. A loose leaf notebook with your paperwork is a terrific tool.
Software Let's deal with disasters first.
Since every hard disk will eventually crash, you need this kind of utility. There's a utility to create a customized emergency rescue disk. You would use this if your computer no longer boots up because of a hard disk problem. Not only will it permit you to boot up, but you can use it to fix the problem in most cases. This feature has saved hours of time and endless grief in our office.