What is disk scan?
Disk scan or scan disk, as Microsoft refers to it, is an application that checks your hard drive for errors and tries to fix them. Most problems are related to improper shutdown or an improperly aborted command.WhyScanning your hard disk can help correct any problems relating to bad sectors, lost clusters or directory errors.Types of scansMicrosoft provides a command called Checkdisk or chkdsk based upon the old DOS operating system command. You can specify that the scan fix problems automatically, scan only, or skip certain types of files.UsesWhen your computer shuts down improperly or seems to be freezing up or acting erratically, it may indicate file structure problems.BenefitsScanning your disk can repair problems by fixing the file structure or possibly isolating files or sectors of your hard drive that are causing the problem. Isolating the sectors makes the sectors unavailable to be used again.CautionsScanning your disk with the chkdsk command and repairing it can overwrite file
