Common Computer Viruses
March 20, 2021
Computer viruses do not vary significantly from real-life viruses, such as flu. When contracted, both can remain dormant in your system and become active when you least expect. However, if you detect them early and take the proper measures on time, you will manage to keep the threats under control and recover quickly. When left unattended, the virus spreads to other parts of your system and wreaks havoc on your computer. While there are thousands of various types of computer viruses that hackers can use to steal your data, you can remove these viruses using antivirus software or seeking help from Techseek. The technicians of the latter are experts in computer virus and malware repair.
To assist you in protecting your essential company information, the list below includes the most common computer viruses and how we help remove them:
1. Macro viruses
Macro viruses aim at software and applications that support macros. They usually attach themselves to Excel spreadsheets and Word documents. In most cases, these viruses spread through email attachments and become activated when you open the corrupted file. If you open the file directly in your business email, the virus will send a similar copy of the file to all your email addresses in your list. If you download the file and open it, the macro virus will spread to Word document and Excel spreadsheet files and change their content.
To eliminate macro viruses, ensure you use reliable protection software, which stops macros from downloading malware to your device. However, if you suspect an Excel or Word document contains macro viruses, press “shift” when opening the file to open it in safe mode and evaluate whether there is any macro present in the file. If you find any macros, you can remove them manually by following the steps below:
i. Click “view.”
ii. Click “macros.”
iii. Click “organizer.”
iv. In the dropdown list, choose the infected document and delete it.
2. Resident viruses
Resident viruses infect your computer and store themselves within the computer’s RAM. They interfere with your operating system, leading to the corruption of programs and files. Resident viruses can even attach themselves to antivirus applications, thereby corrupting any files the antivirus program scans. Getting stored in the memory enables the viruses to spread with ease because they can easily access other parts of your computer. To remove the virus, you can run an antivirus program or remove it manually. If you choose the manual method, follow the following steps:
- Startup the Smart Manager by pressing “Ctrl+Alt+Del.”
- Move to the tab “processes” and check any suspicious files and click on the “end process” key to stop them.
- Press the Start + R button and type “Regedit.” Click on the “Yes” when asked. Windows Registry box will open.
- Expand “HKEY_LOCAL_MACHINE” and press “Ctrl+F.”
- Type the title of the virus in the “Find What” box
- Once the Windows completes the search, delete the suspected files by right-clicking on each one of them.
3. Multipartite viruses
Multipartite viruses infect the whole system, and they can spread by executing unauthorized actions on the operating system, programs, and folders. They can corrupt both the boot sector and executable files. Reformatting the operating system is the easiest way to eliminate multipartite viruses as it enables you to clean your drivers thoroughly.
4. Browser hijacker
As the name implies, the browser hijacker assumes control of certain features of your browser. In most cases, they change your homepage to a malicious search engine and overwrite the settings such that you cannot implement any changes. As a result, your browser gets contaminated, and when you key in an address and press “Enter,” it redirects you to wicked websites and asks you to sign up for or click on something to access the website you want.
In many cases, the developers of browser hijackers intend to use the virus to generate revenue by forcing you to click on ads in your browser. The developers bundle browser hijackers with free software and toolbars that provide innovative search features. Fortunately, your antivirus program can easily detect and eliminate browser hijackers.
5. Web scripting viruses
Web scripting viruses are sneaky malware that target popular websites. They overwrite the website’s code to insert videos and links that will install mischievous software on your computer. In most cases, website owners do not know that their sites are holding potentially destructive content. Experienced cybercriminals write the deviant code and post it as a comment to infect a website.
Web scripting viruses show textual and visual adverts to generate revenue for their developers. Nevertheless, they can steal cookies and use the data to post on your behalf on the corrupted site. Fortunately, your antivirus program will alert you when clicking on a malicious website.
6. File infectors
While macro viruses corrupt files developed using Microsoft Office, file infectors connect themselves to executable computer files or programs with .com and .exe extensions. When you open the corrupted file to start a program, you unintentionally launch the virus as well. File infectors then take control over the program and get transmitted to other executable records on your computer network or hard drive. Cybercriminals use file infectors to comprise your data, make peer-to-peer botnets, and deactivate your security software.
While file infectors infect executable files and memory, using removal software is the best way to eliminate them. While using the software, ensure you boot your computer to DOS mode because system files stay locked when your computer is in windows mode.
7. Boot sector viruses
Although their prevalence has reduced, boot sector viruses can still show in various forms. They hide in a file on an email attachment or USB drive. When activated, they infect a portion of the hard drive and damage your system. However, boot sector viruses do not pose a significant threat because several operating systems have protective features that protect the hard drive’s boot sector against malicious software. Even when they infect your computer, your antivirus program can easily remove them.