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Install Malwarebytes Anti−Malware
Malwarebytes Anti-Malware (MBAM) is a free computer virus removal tool (that offers a premium plan, too). It is an anti-malware software that scans for, identifies the symptoms of computer virus (or malicious software), and removes different types of malicious software (adware, spyware, trojans). Also, it offers an easy-to-use interface and a short wait time for scans.
Download it from the official website, install it on your computer, click of the Scan Now button and wait for the treats to be eliminated.
MBAM also has a premium version which offers a full-time background 'Malware Protection' and Malicious Website Protection, and a shorter wait time for scans, which is not the case with the free version.
Note: Although MBAM automatically updates its database, you can also check for updates manually by clicking Update. For best results, it is recommended to install it and scan for viruses with it while you are in safe mode. If you don't know how to enter the safe mode, click here to learn more.
If you see annoying advertisements you cannot close, or get redirected to a different website without your consent, it's possible that your computer is infected with a malicious adware.
Adware is a term frequently used to describe a form of malware (malicious software) which presents unwanted advertisements when you browse the net. The advertisements produced by adware are sometimes in the form of a pop-up window titled "an offer you can't miss" or some similar phrazes. Those advertisements automatically open webpages infected with a malware (virus, worm, spyware and etc.) which invaded your computer without your knowledge.
If you wonder how to get rid of a virus on your computer, and of other types of malicious software, the best way to fight adwares (and other types of malicious software) is to install an antivirus, antispyware or an adware removal tool. Malwarebytes' Anti-Malware, (for Windows and Mac OS), SuperAntiSpyware (for Windows only) and BitDefender Adware Removal Tool (for Windows and Mac OS) are the most downloaded and trusted. Install them and run periodic scans. Also, be careful what web pages you visit and make sure to install software from trustworthy webpages only (Cnet, Filehippo etc.).
The number of threats to your computer and mobile device is increasing every day. Many developers work hard to find weak spots (bugs) in the operating systems and create new viruses so that they can steal personal data from millions of users.
To be on the safe side, and as a good mobile device/computer virus protection apply the recently released updates once you receive a notification that there is one. DO NOT DOWNLOAD UPDATES from third-party websites because they might have been modified to harm you.
Keep the installed programs/applications up to date
Another way for a virus to infect your computer or mobile device is through an outdated software. Many people just install pieces of software, without checking for updates from time to time. An outdated software can be a way for hackers to gain access to your computer or mobile device as new types of computer virus are "born" on a daily basis.
To define computer spyware: it is a piece of software designed to steal personal data (especially credit card numbers, account passwords etc.), without your knowledge.
How do you get spyware on your computer? There are many ways for spywares to invade your computer, such as: visiting websites like "Enter our site and win an Iphone" or "Click here to download ..."(any software which is not free). This means that spywares are harmful only if you have access to the internet. Once they invade your computer they store everything you write and periodically send it to the creator of the spyware who most often "unloads" your credit card.
How to detect spyware on computer? The best way to detect and fight against them is to install an antivirus, antimalware or an antispyware software. Malwarebytes' Anti-Malware (for Windows and Mac OS) and SuperAntiSpyware (for Windows only) are known to protect many computers from being invaded by spywares. Install one of them and run periodic scans.
Note: If you use a computer and you have sensitive data stored on it, it would be better to buy the full version of one of these softwares (also called Internet security). It will run full scans in the background and the wait time will be shorter.
Keyloggers are designed to record every single letter you write on your keyboard. They are mostly used to steal personal data (credit card numbers, passwords) because they consume minimum resources and are hardly noticed by users. But, some people use them to control what their children do when they use the computer.
Although they share common traits with spywares (they both spy on the user's activity), they can be accessed by the user (if he manages to guess the secret combination, e.g. Ctrl + Shift + 1) and reprogrammed (change the location where the keylogger files are stored, change the email to which keylogger files are sent and etc.). Unless you have an access to the net, you cannot be harmed by keyloggers.
The best way to fight them is to install an antivirus or an antispyware software. Malwarebytes' Anti-Malware (a free computer virus removal tool, with an option for premium features) is one of the best options to fight keyloggers. Also, scan your computer more often and AVOID VISITING SUSPICIOUS PAGES, which is the best computer virus protection.
Note: If you want to use a keylogger to watch over your child(ren), download it from trustworthy sites only (e.g. Cnet), because you risk becoming someone else's "child" without your knowledge.
Scan pieces of software and URLs using VirusTotal.com
VirusTotal is a website that provides free check-up for files and websites for viruses. It uses 55 different antivirus products and 61 online scan engines to check for viruses that the computer's or the mobile device's antivirus may have missed. This is a good way to prevent malwares from invading your computer and an answer to the "how to get rid of a computer virus (or of a mobile device one)" question.
Upload a file (up to 128 MB) or copy a URL you find suspicious. Based on analyses of all the softwares you will be informed whether the file or the URL is malicious and spare you from troubles.
Note: There are some files which may be recognised as viruses by SOME of the antiviruses, and they are actually not. Those files are known as false positives. So if a file is treated as a virus by small number of antiviruses (e.g 2 out of 10), then it is most likely a false positive file.
Phishing email messages, links, or phone calls are another way for a virus to find its way to your computer. You are asked to provide your credit card number, log in to Facebook (or other social network) through the email and etc.
The best way to protect yourself from phishing emails, and the best mobile device or computer virus protection in general, is to avoid opening them and READ THE TITLE CAREFULLY. So, if you notice an email that has a suspicious title and is sent from a suspicious email address, don't open it. Usually suspicious mails are directed to the Junk folder and valid emails are shown in the regular Inbox folder. However, there are some cases where valid emails are shown in the junk folder.
Also, ignore emails that inform you that you've won a contest or emails from a stranger asking for assistance with their inheritance.
Note: If you are not sure how to recognise a phishing email, read this tutorial. If you are still not able to recognise a phishing email, consider installing an antivirus software which will delete phishing emails automatically.
If you wonder how to protect computer from virus, you may take advantage of the Firewall. The OS (Operating System) Firewall is designed to protect you from the attacks of hackers. It can also stop your computer from sending malicious software to other computers. That is why, it is very important to have it activated all the time. By activating the firewall you will minimize the chances for hackers to find a bug in your computer.
To activate it:
Start -> Control Panel -> Windows Firewall (or type 'Firewall' in the search box) -> click Turn Windows Firewall on or off in the left pane -> Click Turn on Windows Firewall under each network location that you want to help protect, and apply the changes.
Os X v10.5
Apple menu -> System Preferences -> Security -> Firewall -> Choose what mode you would like the Firewall to use
OS X v10.6 and later
Apple menu -> System Preferences -> Security (or Security & Privacy) -> Click the Firewall tab -> Unlock the pane by clicking the lock in the lower-left corner and enter the administrator username and password -> Turn On Firewall (or Start) -> Click Advanced to customize the firewall configuration
Note: Some antiviruses have their own Firewall that will substitute the default Windows Firewall once they are installed (You will be notified by the Antivirus software). Do not enable the default Windows Firewall in those situations.
People are aware that there are many websites out there designed to steal their data; However, the hardest part is to identify those websites. Usually those websites offer paid versions of popular softwares (such as antiviruses, games etc.), or an easy way for making money without effort. Once you open the website you will be asked to install a piece of software that allegedly improves your browsing experience. Do not accept it because not only does it not improve your browsing experience, but also it infects your computer or mobile device.
If you are not sure whether a website is safe or not, you can check it with virustotal's engine. Virustotal is a website that provides free check-up for files and websites for viruses. It uses 55 different antivirus products and 61 online scan engines to check for viruses that the computer's antivirus may have missed.
All you need to do is to copy the link of the suspicious website in the designated field and wait for the results.