Special Edition Using MS-DOS® 6.22, Third Edition

Chapter 9. Protecting Your Data

In this chapter

• Avoiding Data Loss

• Understanding Microsoft Backup

• Using Microsoft Backup

• Understanding Computer Viruses

• Unformatting a Disk

• Recovering Deleted Files with UNDELETE

• Using the Microsoft Undelete Program for Windows 3.x

• Project: Developing a Backup Policy

Avoiding Data Loss

Desktop personal computers store information on hard disk drives. These days drives average 4GB–20GB in size, with drives in newer high-end systems hitting as much as 40 or 60GB. (Older systems, however, might have hard drives of only 500MB, and possibly smaller.) The hard drive stores the operating system and application files installed on the system. It typically also includes all the personal and business data that has been loaded or ...