Transcription: But even more important than this is tools. You should do one of these things on a regular basis. The most important in the short run is error checking. If you have a power failure or if your computer gets turned off without using the shutdown feature, you should always run this immediately. Error checking looks on your disk and finds any problems. Let's check it now. Click on Check now. You want to tell it what drive to check and you should choose your hard disk which will be drive C or D and choose a standard test. You don't want to check automatically fix errors and then you click on start. ...