The invention of computers makes almost all things are possible. Computers usually used to meet the needs of the people. It contains programs and instruction to execute a task. Because of the curiosity of software developers, hackers and computer nerds, viruses came to its existence.
What is a computer virus? 
Image Source: http://100vista.com/wp-content/uploads/2010/02/computer-virus-bugs-clip-art-thumb31676741.jpg Computer virus is a program and instruction like what software has. It is usually designed to destroy the computer's performance. Almost all computer viruses have and auto run program. It could run immediately without a user's command.
How to avoid computer viruses? 1.Install an Antivirus 
Image Source: http://paulmudgett.com/blog/wp-content/uploads/2010/03/antivirus1.gif An antivirus is a program designed to eliminate and prevent computer viruses from executing. Make sure to install the latest antivirus possible.
2.Update your Antivirus Antivirus has its own database where the recorded virus threats are stored. New computer viruses attack almost every year. It is very important to have the latest database by updating.
3.Scan your external storage devices (flash drives, external hard disks, memory cards) 
Image Source: http://imgsrv.worldstart.com/ct-images/onlinestorage.jpg Most computer viruses are transferred through the use of external storage devices. Since it is inserted into the USB port, it can execute an auto run command upon insertion. Make sure that you do not open the storage device upon insertion, make a quick scan first using an antivirus that you have.
4.Always read the prompts that appear from your window Some computer viruses prompt you to click the yes or ok button. Clicking this will allow the virus to enter into your drive C which the windows are installed.
5.Create 2 Administrator Accounts 
Image Source: http://www.walkernews.net/wp-content/uploads/2007/11/vista-ultimate-administrator-account.JPG This number 5 tip is for Windows Operating systems users. Your Operating System has a default account once it is installed, it is the Super Administrator. Make sure that you do not use your Super Administrator account for personal use. Just keep it as your back up user account. Create another account if possible just a standard account. This will prevent the computer virus to access and manipulate the system settings and data of your computer.
6.Avoid downloading useless files from the Internet We all know that the Internet is one of the main sources of many files from around the world. Some of these files contain computer viruses. Avoid downloading files or software if you think that it is not important.
Whatever information and tips that you may gather from different sources, it is always important for a user to be responsible enough in using the computer as they always said that prevention is better that cure.