Types of Computer Viruses

Bootsector Virus:

A virus which attaches itself to the first part of the hard disk that is read by the computer upon bootup. These are normally spread by floppy disks.

Note: Floppy disks are kind of outdated, so, perhaps, it's spread through portable hard disks or boot CDs.

Macro Virus:

Macro viruses are viruses that use another application's macro programming language to distribute themselves. They infect documents such as MS Word or MS Excel and are typically spread to other similar documents.

This is a nightmare to every office workers. Once your computer is infected, your whole documents will be destroyed. So, always do backups!
 
Memory Resident Viruses:
Memory Resident Viruses reside in a computers volitale memory (RAM). They are initiated from a virus which runs on the computer and they stay in memory after it's initiating program closes.

Rootkit Virus:
A rootkit virus is an undetectable virus which attempts to allow someone to gain control of a computer system. The term rootkit comes from the linux administrator root user. These viruses are usually installed by trojans and are normally disguised as operating system files.

Polymorphic Viruses:
Well, poly means many and morph means form. So, this type of virus will replicate itself into many forms of file. Now, you might see it as a .pdf file. Next time you log in, it might have changed itself into a .dll file. It is extremely difficult to detect manually. Even some antivirus might miss it while scanning for viruses.

Logic Bombs/Time Bombs:
These are viruses which are programmed to initiate at a specific date or when a specific event occurs. Some examples are a virus which deletes your photos on Halloween, or a virus which deletes a database table if a certain employee gets fired.

This is my favorite type of virus, it is completely unpredictable, only the coder of the virus knows what will happen and when it will happen.
DeepFreeze might be able to counter this type of virus.

Important Note:
Knowing that viruses have a very big effect on your computer, you might want to update your firewalls and antivirus for protection. Everyday, hundreds(maybe thousands) of new viruses are made, with even more creative ways of infecting and surviving.

So, always keep your antivirus and firewalls up-to-date. However, do not get trapped by those fake antivirus providers. Only use trusted antivirus brands, such as Avira, Norton, AVG(Grisoft), and NOD32.


Thanks for reading.
Cyber Frost

Deep Freeze Vs. Antiviruses

I believe we all know these names below:

• Kaspersky Antivirus
• Norton Antivirus
• AVG
• ESET NOD32 Antivirus
• Avira Antivirus
• and many more...

And, maybe some of you have known the program Deep Freeze, a utility that can restore your computer to its former state(the date when you first installed Deep Freeze) when the computer is restarted.

In my opinion, this capability of Deep Freeze to restore a computer's state is more useful than antiviruses capability of removing virus, which they rarely succeed to do because they are blocked by the virus itself.

Therefore I suggest you to download and install the latest version of Deep Freeze in your computer. It is user-friendly, versatile, and easy-to-use. You can download the latest free version of Deep Freeze here.

Note: Please notice that the Free Version of the program protects only Drive C:, which is the most important drive in your computer, containing system files needed to boot your computer up. Drives other than C: will not be protected, please take note on this.

When you accidentally deleted an important file, simply restart and the file will be restored. However you should also take note that any changes you make in a Frozen state will not take effect. If you want to install any new programs, you should set the state to Thawed and restart your computer before you can install it. The same trick is used when you want to save/download a file, document, etc.


Hope this helps. Thank you for reading.

Cyber Frost