The basis of the data protection is only backing up your data. All the areas on your disk should be backed up regularly. A complete backup program consists of the following steps:
Back up the type of drive, system files and user data (regular), make "emergency" boot floppy for each system and take precautions to minimize the possibility of accidental format. You can find the leading data protection services via online source.
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Regularly defragment data for ease of data recovery tasks, taking advantage of the verification features of the operating system and applications if applicable.
Stay in the back of your mind the threat posed by computer viruses and knowledge about how to protect your computer and data. The safest way to avoid computer viruses is to use a very good antivirus and update it regularly.
Also of great importance is the information CMOS type of hard drive. Specification document for the drive heads, sectors, and you will always be able to enter your data into the new system and get the urge to work.
Backing up the file system can not be overemphasized. The operating system's standard file systems, including the configuration file that directs the operating system about how to work and how the application should work with it.
If you lose these files you can come to a dead end. If you are concerned about data integrity, backup regularly and quickly too.