What is a Computer Virus?

By definition, computer viruses are executable programs that can reproduce or replicate and disrupt a computer’s normal operation. The spread of computer viruses started in the late 1970’s when floppy disks were used widely by computer owners to exchange and save files. Viruses were primarily transferred to another computer through this mode of storage. Viruses attach themselves on any part of program especially those which are executed upon starting up a computer. At present, viruses are transferred through networks and the internet.

How Does A Computer Virus Work?

There are two types of viruses and they are identified on the way they replicate once they come in contact with your computer’s hard drive. These types are known as “Nonresident viruses” and “Resident viruses”. The difference between these two are explained below.

Nonresident Computer Virus

A nonresident computer virus is also known as a finder virus. It is consist of a module that searches and infects a new file that is compatible to its configuration and a module that replicates and infects any executable file that the finder module is able to find. This type of computer virus is harmful because it usually operates as a background program and is not easily noticed by any computer owner.

Resident Computer Virus

A resident computer virus also contains a module for replication but it doesn’t need to be summoned by a finder module. The virus program is simply loaded to the memory, once it is executed and does the same infecting process to other files; it will be doing the same process every time you use the affected programs on your PC or even every moment that you turn your machine on. This type of virus is capable of infecting a lot of files on your computer with the use of a fast infector, but doing so will also increase the chances of it being detected by an antivirus program.

What does a Computer Virus Do?

A computer virus infects files on your computer especially those that are used in the boot up process. Once a computer is infected by a virus, processes become slower to load and programs become more susceptible to “crashes” and internal memory errors. Other computer viruses may also erase or corrupt important documents and files on your computer making it inaccessible. Still, there are powerful viruses that can totally erase your hard drive’s memory and even damage your computer’s hard disk.

 

Preventing Computer Viruses

Computer viruses are quite easy to prevent using antivirus programs. There are lots of antivirus programs available on the internet today which can be purchased using a credit or a debit card. Installing an antivirus program is an effective way of preventing computer viruses from spreading in your computer’s memory. USB antivirus is also useful in preventing the spread of viruses through a USB mass storage device.

Performing a regular wide memory scan will also lessen the chances of any computer virus from spreading. Viruses are normally detected by your antivirus program and are immediately moved to a place where it is incapable of executing itself and infecting other important files in your computer. The antivirus software you purchased is also capable of deleting viruses and other malicious programs from your computer.

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Have you ever experienced using a computer then suddenly it hanged and stayed on one page for a long time? This is a common scenario especially when a computer becomes exhausted because it has been used for a long period of time. It may also be caused by malicious software (malware) or viruses that may have corrupted some files on your registry.

Knowing what to do during these critical situations will help you save your computer from further damages that may prove to be very expensive repairs in the long run. Prevent the spread of malicious software and save your computer from damages. Learn when to “Reboot” your computer and spare yourself from these problems.

When and Why?

Computers depend on a lot of executable programs saved on your RAM in order for it to run properly. Over time as you use your machine for a lot of your work, your RAM may become overwhelmed and experience some errors and have corrupted files in it. It is also possible that your registry has been infected by a type of virus which causes the computer hang, errors and crashes. Rebooting your PC when these errors occur helps lessen the impact and may even fix the existing errors and restore your system to a safe state.

Situations That Needs a Reboot

1.    Reboot After a New Program Installation

Your system will automatically alert you to reboot your computer after a new program is installed to it. This is primarily needed to enable your system to properly write all the needed files and information on your drive. Failing to reboot your computer will render the program useless. The program will not work properly unless a soft reboot/ restart is done.

2.    Reboot When an Internal Problem Caused Your Computer to Hang

The type of reboot applicable to this problem depends on the situation. If your mouse pointer can still access the windows logo on the lower left corner of your screen then you can do the soft reboot of “restart” by choosing the right option. If in case the screen or the window hanged totally (the pointer can’t be moved and the shortcut keys are not working) then a hard reboot is needed. It is done by holding the power key for about 5-7 seconds until the indicator lights on your machine turns off.

3.    Reboot To Safe Mode When Computer Suddenly Shuts Down

 

Rebooting to safe mode is needed when an error happens or the machine suddenly turned off due to power outage or not enough battery power. It is recommended that you choose the safe mode option on the start-up screen upon turning your machine on to help your system cope up with any errors and fix it without sacrificing other files.

4.    Reboot When Reinstalling Your Operating System

This option is needed when you already decided to reformat your computer due to viruses that can’t even be removed. It is done by pressing F12 when prompted after the power button is pressed. F12 will show you the booting up options but before turning your PC on you must place your installer disk on the DVD drive first for it to be detected upon booting up.

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Rebooting a PC may sound quite complicated but it doesn’t need to be so. A computer is an important machine that has become an essential part of the day to day tasks of modern living. No matter what type of machine you own, whether it’s a desktop computer or the lightweight, portable version we commonly call “laptops”, knowing the basics when something goes wrong is an essential knowledge that a computer owner must possess.

Have you ever suffered from computers that hang for almost an hour and refused to be controlled or shutdown using the ways you know? If you already did then you might have missed to do this thing called a “reboot”.

Ways of Doing a Computer Reboot

There are 2 known ways of rebooting a PC which you can try for yourself. One is called a “soft reboot” and the other is known as the “hard reboot”. Both works perfectly depending on the type of problem you have. A soft reboot is commonly needed for computers that suffered minor system hangs or other related errors which causes some programs to stop working properly. A hard reboot on the other hand serves best for major system problems like a computer that has been logging on for almost an hour or a totally unresponsive screen where nothing is clickable anymore of the shutdown button is inaccessible anymore.

Soft PC Reboot

If your machine has a program that is unresponsive or something that keeps on loading but is not opened after a long period of time then you are suffering from an internal error that needs to be fixed. A soft reboot is needed for this type of problem. It is easily done by clicking the windows logo on the lower left corner of your computer screen and choosing the arrow right button just beside the shutdown button. When you already did that you just simply need to click the “Restart” option and you’re done!

Hard PC Reboot

A hard PC reboot is needed if your computer has been on one window and stays there for almost an hour and the options are inaccessible or are refusing to be clicked. This is a major problem that might have been caused by a program or a memory error which can only be fixed by executing a hard reboot. Hard Rebooting your computer will fix all program and system errors and will restore everything to the normal state. This is done by pressing on the power button and holding it for about 5-7 seconds until the computer has powered down. Once the power is down, wait for about 15-20 seconds more before turning the machine on again.

The Effects

Both types of rebooting your computer may cause data loss. It is always recommended that you save any work you are doing before rebooting your pc. You can do it by using the keys just in case the mouse pointer is not working. Using the arrow keys and the tab button as well as the enter button will help you navigate your window and access the file folder where you can save your work. Always do it the safe soft reboot way and avoid doing the hard reboot often if possible.

 

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Computer Viruses are unwanted self-replicating program that infects your computer without you knowing it. There are thousands of viruses luring around the internet at present which may enter your computer anytime it finds an opportunity. Anything that is unwanted should be removed, quarantined and deleted from your machine’s memory.

Viruses are not only unwanted, they are also harmful and destructive. How will you remove one that is already on your computer’s hard drive? A thorough knowledge on the “how to’s” can save you a lot of money in repairs!

Check this related article: What are Computer Viruses

Computer viruses are found anywhere in the computing and internet space. From USB’s to emails, free software and the like. It is almost impossible to distinguish these tiny, self-replicating executable programs. The only way to know it is when your machine is already infected and starting to slow down. Although virus protection software are available, the free version you might be using is incapable of detecting the more advanced viruses.

How Computer Viruses Work

We found this video that explains how viruses work. The video is a bit outdated, but the concepts remain relevant. Current viruses, though, use social engineering to infect machines. You should never click on an email link or a pop up ad. Instead, type the web address by hand in your internet browser to make sure you are not being redirected to an infected website.

Ways to Remove Computer Viruses.

Remove Worst Computer Viruses using Windows Restore

Windows operating systems like XP, Vista and Windows 7 are designed to have a System restore tool which is very useful once your computer becomes infected by a virus at one point. This tool works by restoring an earlier image of your operating system. This is done by turning on your machine and booting on the system restore option. Your system will be automatically restored to the state before it was infected by the virus. Once the restore process is done make sure to perform a wide scan on your memory and remove all detected viruses.

 Registry repair virus removal

There are also instances that a virus attacks your computer’s registry making your computer slow and hang most of the time. A simple way to remove the virus that causes this is by downloading free registry repair software or just letting windows do the process. After the registry repair, do the wide scan and remove all detected viruses.

 Removing a virus using your antivirus software

Remove Computer Viruses Antivirus software can also most recent computer viruses from your computer. This is done by simply doing a full scan on your machine’s memory. Once the scan is done, the software will automatically move the malicious files into a virus vault. If you are using a professional version, you can choose to delete the viruses detected and solve the problem right away although viruses which has infected the computer before the antivirus software was installed can, either infect the software or will not be detected by the software itself.

 Reformat

 If you really want to clean up your system then reinstalling your operating system is a very effective way. This is done by totally reformatting your computer’s hard drive which means that all of the files saved and those which has been infected will be totally removed from your computer, that is why a system restore and a back-up folder is recommended to be saved on another partition. Once your drive has been reformatted, you can insert your software installation CD on your built-in or portable DVD drive and boot up your computer using the CD by pressing F10. The re-installation process will start automatically and all the viruses will be removed.

If you cannot fix it yourself

In some cases, the sole idea of trying to fix a virus yourself may scare you. We can help you with virus removal and many other services either by phone and remote support, at your home or place of business or in our locations in Gaithersburg, MD or Vienna, VA.

We are happy to answer any questions about Computer Viruses or help you Repair a Computer Worm Infection. Please give us a call, we are standing by to help.

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We had a customer this week who dropped his laptop, it was a Sony VAIO. When we turned it on, we were able to listen the computer on, but the screen was not showing anything at all.

After the analysis, we found that the problem was the motherboard. The motherboard had damages that were not able to be fixed, so the solution was to replace the motherboard. After it was replaced and installed, the machine worked properly.

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Clean Your ComputerThere are a lot of things that can go wrong with your computer. But overheating is of the problems that every computer or laptop owner worries about. When electric current passes through different components in the computer, a lot of heat is generated. Although there are fans and other cooling mechanisms that the manufacturer has included in the system, computers tend to overheat when used for too long, or as they age. Here are a few tips that can help you in preventing your computer from overheating. Continue reading “Top Tips to Keep Your Computer Cool” »

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The best possible solution to cleaning a virus in your computer is to format the entire hard drive and reinstall the operating system. But not many people are inclined towards this solution as there is a risk of data loss. Also, if you don’t reinstall your OS properly, your computer will not work the way it should. This article will give you an easy way of reinstalling your OS. Continue reading “A Guide to Reinstall Your Operating System | Reinstall Operative System” »

Don't Treat Laptops Like DesktopsOne of the mistakes people do is treat laptops like desktops. This mistake will lead to reduced lifespan of the laptop and constant problems while using it. There are a few tips that you must keep in mind while taking care of your laptop. These steps are easy to follow and can be used for maintenance of your laptop right at your home. Continue reading “Top Laptop Maintenance Tips” »

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The VirusViruses and malicious software are big threats that computer users have to deal with on a regular basis. With so many different types of virus protection software available from different reputable vendors, you might think that you are off the hook when it comes to protecting your computer against threats. But that is not the case. Antivirus software can only do so much for your computer. There are a few tips that you should keep in mind to protect your computer against malicious software. Continue reading “Tips to Keep your Computer Virus-Free” »

One of the most common computer complaints is that ‘my computer has crashed’. Everyone knows what a crash is. The operating system just freezes and sometimes, you end up with a blank screen or a blue screen. The bottom line is that the computer stops working and you cannot do anything about it, how many ever times you try to restart it or reset it. The general consensus is that computer crashes occur because of a software glitch, which is partly true. But there are several steps that you can undertake to ensure that you prevent a computer crash as far as possible. Continue reading “Top Tips to Prevent a Computer Crash” »

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