Myth #1: I have installed an Antivirus Software, my PC is secure
It is one of the most common misconception about antivirus softwares that their presence is all you need to secure your computer. Viruses are also none other than piece of code or software, just like your anti-virus software. They both are created by those having knowledge of both and to fight against each other. Both viruses and antiviruses keep them up to date and competitive against each other.
Myth #2: My PC is safe because I Regularly Update my Antivirus
This is another myth that if you have updated Antivirus software, your computer will not get infected. Viruses that spreads like wildfire are advanced, tried and tested piece of code, that are specially build to trick the anti-xxx like security applications.
The time lag between a virus like program is found, its finger prints being recorded, creating vaccines against these viruses by antivirus companies, distributing these vaccines (antivirus updates), updating your antivirus program and then scanning the whole computer with these antivirus updates can take few hours to few weeks, or sometimes few months. This is sufficient time for the viruses to do what they are built for.
Myth #3: I do not use Internet on my computer, so no chance of getting infected
Internet is not only the place from where your computer will get viruses and other malwares. USB drives, CDs, DVDs are other popular mediums through which infections spread. Malwares may also be present in some of the softwares, games or files you are using, even if they are popular and trusted but taken from untrusted sources like your friend’s computer.
Myth #4: My Antivirus detected a Virus. I must delete it
Not all the files detected by your antivirus application as ‘infected’ are necessarily infected. There is no guarantee that your antivirus application will treat other beneficial softwares, tools or files in a friendly way. It happens many times that some antivirus applications determines other applications such as anti-spyware, anti-adware or other security applications or sometimes your important files suspiciously and block their usage. So you cannot be sure, whether the ‘infected’ file is really infected or not.
Myth #5: My computer is safe if I don’t download anything from Internet
Of course, downloading files from untrusted sources increase the risk of your computer to get infected, but it is not at all necessary thing that only downloading the applications will put your PC at risk. There are many other ways through which your PC may get infected, even in the presence of a good antivirus application. Sometimes accessing insecure websites such as Porn, Adult, Gambling websites, etc., will run some scripts on your browser and one wrong click anywhere will cause you much.
Myth #6: My computer is running slow nowadays. It must have infected with virus
It happens most of the time, when your computer get infected, it starts slowing down the performance, or at least slowing down your internet connection speed because viruses and their cousins tend to connect with their secret servers. But it is not at all necessary that your computer is getting slower which means you computer is infected with viruses.
There might be other reason such as you did not run Defragmentation application since long, you have installed many applications on your computer, your hard-disk is full with songs and movies, and many more. You cannot blame it all to to the viruses.
Myth #7: I don’t need an anti-virus
Trust me, I am not doubting your intelligence, but we are humans and someone already agreed me saying, “to err is human”. Even I used to call myself smarter than others when it comes to deal with computers and softwares, but, at one time or other, you meet other smart people who can take you back to the Earth.
People trying to create viruses, spywares, adwares and also those are creating vaccines on them in antivirus companies are much smarter than most of us. Not only they are smarter but also they keep evolving every now and then. So you and I are left with no choice but to trust on antivirus applications for most of the common needs of safety.
Myth #8: My Antivirus software found and deleted viruses. My PC is clean now
Let me share one of my experience with one so called ‘popular’ antivirus application in the market. This antivirus was installed in almost all the computers in the company I was working. The virus makers came with a solution to trick antivirus applications by splitting the virus in two different parts. The first part was like a normal software that can create a text file (code or scripts are also text files with some programming code written on them) at a regular interval. and the second part was the text file or actual virus (script).
The trick was anti virus could detect the virus (script) but cannot detect the first part of the application as a virus, because it is just a simple application that can create another text file. This cannot be categorized as ‘virus like activity’ as almost all the applications creates temporary files, other files and folders on your computer. So that antivirus could only find second part as a virus and users were annoyed every 10 to 15 seconds that a virus has been found.
Myth #9: If I do not open Porn / Adult Websites, my PC will not get infected
If you are thinking only porn, adult or gambling websites run bad scripts in the background, you should definitely read my last blog post, Facebook applications that might annoy your friends. You must have already heard about Phishing websites which are nothing but clones of popular websites, especially banks and financial websites, to to trick you.
Email attachments are also one of the common way to get infected. I have also seen some people hiding one fine inside other files. For example, I saw someone to hide a video inside a image file. If you open that file, image will show up as it generally does, but very few knew how to see that hidden video inside that image file.
Myth #10: Purchased antivirus is better than FREE antivirus
Last months there was a ‘Tech Fest’ in our town. I saw approx 5 new antivirus companies marketing there and people were also buying these antivirus like crazy because they had some really nice discount plans.
If you know some programmers and have some money to form a little company, you can also create an antivirus application. So if you think you have purchased an antivirus and now you are more secure, I think, you need to rethink. There are options in the antivirus market that are not only free but also effective enough to keep you secure from most of the common threats. Money cannot be the only factor when choosing a good antivirus software for your PC.
Myth #11: A Virus can Damage My Hard-disk or burn my PC
Yes and No. No because virus is just another piece of code, a software like any other softwares on your computer. It can only do things in the scope of your hardware and operating software. Viruses cannot physically damage Hard-disk or fire your PC if you do not have any such hardware and drivers (software) installed.
Yes, because sometimes it can control hardwares and do some nasty things like Over-clocking your CPU, on-off your computer (done via software), open-close-block your CD/DVD drive (done via software) and so on. But chances doing harm on hardware lever are very low.
Myth #12: I will format my C drive and all virus will be gone
Viruses use things to activate themselves called ‘Triggers’. Trigger can be anything like a simple text file like autorun.ini file commonly found in pen drives, any combination key, clicking or double clicking an file and so on.
Once I had to deal with a virus that creates an executable copy of itself on each and every hard drive, having icon of a folder. Since viewing of extension is disabled by default on Windows ( like .docx) what you see is an .exe application looking very similar to a folder and named with catchy title. One click on such files will again install viruses on your newly formatted Windows. You never know the tricks of virus makers.
Myth #13: Deleting a suspicious file is better than Quarantine
For two reasons, I think this is not a good idea. First, not all the files that are found by antivirus are really infected. Sometimes it can also detect your important data as infected and your data cannot be separated from infection. Deleting your data is losing your data at such situations. Such mistake can happen when your computer is detected with large number of infections and you don’t have time to manually see those couple of thousand infected files.
Second thing is deleting is not the correct way to throw a file out of your computer. These files can still be in your computer and won’t get deleted completely. This is how Windows is built. Sometimes viruses hide themselves in System Volume Information and sometimes they are stored via System Restore application. Restoring your computer to earlier point will bring back all those viruses, or if you did not restore, they will still be present at your computer in inactive mode.
Myth #14: Viruses attacks only pirated Windows, I have genuine updated Windows OS, I am safe
Using a genuine windows and updating it regularly sure reduces chances of getting infected with viruses, but it is no guarantee. On the contrary, sometimes, updating your software will leave you at greater risk than not updating. Don’t you know that why updates are available to download for Windows every now and then? It is because somewhere, someone finds loopholes in the Windows Operating Systems and viruses are created. When people notice and report problems, updates are created.
Myth #15: My security software have Anti-virus, Anti-malware, Anti-spyware, Anti-adware, Firewall; I am protected
Having these security tools will surely reduce risk of infections, but above these all, your brain is the best tool that protects your computer. When was the last time you updated it?