A computer virus is a piece of code or a small program that is loaded into your computer or smartphone without your knowledge for the purpose of interfering with how the operating systems works, steal or erase information, or even destroy the whole system.
Computer viruses are mostly made by hackers or other malicious people for their benefit. Most of the computer viruses made today have an ability to reproduce themselves. How dangerous a computer virus is cannot be determined by the length of the code used to program it.
The following are symptoms that will help you determine whether your computer is infected with a Malware or not.
Ads Pop Ups
This is a small advertisement banner that emerges when your computer is connected to the Internet. Most browsers contain an inbuilt adblocker that prevents ads pop-ups while you are surfing the web.
The browsers inbuilt pop blockers are not strong enough to keep you away from the ads that result from a virus inside the computer. If you see frequent pop-ups and even whenever you browsers are not running, please note there is a possibility that your computer or your smartphone is infected with a type of a computer virus known as adware.
Most of the websites with free contents for download like movies and music contains a link that if clicked they automatically starts downloading an adware. Having a well up to date anti-virus will keep safe from such.
If you computer is already infected, you can download buy antivirus such as Kaspersky, Spybot and search & destroy.
Tools and programs are inaccessible
Sometimes if a computer is a virus infected it keeps you away from accessing your important files and programs, your computer can be often free. If you detect such a problem, it will recommend you hit ctrl + alt + delete all at the same time, and this would lead to a window showing you all tasks that are running.
If you come across the name of a program that is unfamiliar, it is advisable to search it on your favorite search engine to confirm whether the type of program is a part of your operating system if it is not, just know your computer is infected with malware.
In some instances hitting the ctrl + alt + delete may not have an effect and this is a sign of virus infected the computer. To remove such an anti-virus, it is required for one to use a deep scanning anti-virus such as Malwarebytes to remove the virus or consult a computer technician.
Your computer not exhibiting the other symptoms does not mean that your computer is free from viruses.
There are very powerful malware that hide behind files or images, and they can only be detected by checking your Internet speed and comparing it with what your ISP is providing you, there may be a slight difference but a huge difference means that your computer is infected.
This type of viruses can be removed using strong anti-viruses like Kaspersky, Malwarebytes.
Please note, there are several symptoms of a virus infected, the above mentioned are the most common and apart from the tools for virus removal mentioned here there are many others some paid and others free.