A backup is an exact copy of a single computer file or set of files used to restore data in case of destruction or damages.

Taking regular data backups is a vital task to avoid huge damages that could cost a lot of money and time, and some times it is not possible to make up for damages without a backup being present.

Loss of computer files is very serious and damaging experience in many cases that can even lead to bankruptcy.

Some hints on data backups:

A Trojan horse is a special kind of malicious software (malware) that can carry out many unwanted thing after infecting a computer.

Trojan horses do not replicate (reproduce), unlike viruses and computer worms.

A Trojan horse consists of two parts, a server and a client.

Server is the part of a Trojan horse that infects a computer and client is the part that sits on the computer of the malicious person that uses the Trojan horse.

The server part is controlled by client through the Internet.

Firewalls are specialized softwares used to protect privacy and security of users of network connected computer by controlling inbound (inward) and outbound (outward) data traffic.

Firewalls come in two different forms:

1. Software based firewalls
2. Hardware based firewalls

Firewalls can be additionally classified into two other categories. Firewalls used on client computers and ones used on server computers.

File shredders are special computer programs used to destroy computer files beyond retrieval.

File shredders are identical to paper shredders that are used to shred unwanted papers that contain sensitive information.

File shredders destroy any given file by overwriting it several times with random and meaningless data. Several overwrite passes are used to ensure that the deleted file will not be recoverable.

File shredders use special algorithms. Some of these algorithms have become de facto standards for shredding computer files.

There are many persons that use data and information in an interchangeable way and these two concepts essentially are of same meaning to them, but while data and information are closely related to each other, they bear completely different meanings.

Data is a fact and something that should be applied some standards to create a meaningful product. The standards to be applied are special algorithms applied based on type of the data.

Let's have a closer look at algorithms to see what an algorithm means.

PCs are the most widely used computers in the world and it is useful to have a brief look at these amazing machines.

Hardware of the PCs has modular design. All devices are attached to a board called mother board or main board of the computer through special sockets called ports and are detachable when necessary.

Main board of the computer contains electronics and specific integrated circuits (ICs).

Security and privacy have always been collectively one of the main concerns of humans and so many measures have been taken to ensure these two very important concepts have been provided.

The interesting thing about security and privacy is the fact that the same concepts apply to information technology world and essentially there is no difference between security and privacy in real world and virtual world of IT.

Things like passwords, locked doors and checking for identity are now used in their virtual form in information technology.

Malicious and unwanted computer programs are collectively called malwares.

Malwares have become part of information technology and computer science history and some have caused severe outbreaks infecting thousands of computer worldwide resulting in huge security breaches and financial damages.

Incredible advances in information technology and the Internet in recent years and the fact that the number of computer and Internet users grow in number every day has been one of the main reasons that has facilitated malicious software spread.

SeaMonkey is a free and open source Internet application suite that means it contains several softwares in a single package.

SeaMonkey is the result of a community based effort to provide a free software package to meet the needs of the Internet users and web developers at the same time.

The web browser present in SeaMonkey package is an excellent program that loads web pages very fast and contains many useful features, but is less known unlike web browsers like Firefox that is extremely popular.

Avast antivirus is an amazing software consisting of several useful and great computer programs.

Avast provides several antivirus shields. Instant messaging, P2P, Internet mail, network shield, Outlook /Exchange, standard shield and web shield.

Avast checks for new updates by default and downloads and installs them. The user is notified when new versions of the  software are available and enables the user to download and install the new version through a single click.