System Restore is a component of Microsoft's Windows Me, Windows XP and Windows Vista operating systems that allows for the rolling back of system files, registry keys, installed programs, etc., to a previous state in the event of a failure. System Restore is a specific and systemic implementation of personal computer backup.

Firewall is a dedicated appliance, or software running on another computer, which inspects network traffic passing through it, and denies or permits passage based on a set of rules. There are several classifications of firewalls depending on where the communication is taking place, where the communication is intercepted and the state that is being traced.

Data privacy is the relationship between collection and dissemination of data, technology, the public expectation of privacy, and the legal issues surrounding them. Privacy concerns exist wherever personally identifiable information is collected and stored - in digital form or otherwise. Improper or non-existent disclosure control can be the root cause for privacy issues. Data privacy issues can arise in response to information from a wide range of sources, such as healthcare records, criminal justice investigations and proceedings, financial institutions and transactions biological traits, such as genetic material, residence and geographic records and ethnicity.

Data Shredding is software like a real world paper shredder, permanently deletes your files making them unrecoverable for good.

Anti-Spyware Many programmers and some commercial firms have released products designed to remove or block spyware called anti-spyware. They can provide real time protection against the installation of spyware software on your computer. This type of spyware protection works the same way as that of anti-virus protection in that the anti-spyware software scans all incoming network data for spyware software and blocks any threats it comes across.