No matter your operating system, you need to keep your computer secure. We tested premium and free computer security software to see how well they protect you on the internet. We also give our top tips for staying safe online.
Bottom line: This macOS computer security software is OK to use, but it provides poor protection for your computer and has a moderate impact on the system.
Bottom line: G Data Antivirus for macOS is the only security software for Mac we recommend. It has the highest protection score and one of the lowest impacts on system performance in our test for macOS. It did very well at detecting malware in our on-access test, not missing any of the malware stored on a USB drive while online. However, it did have room for improvement in our on-demand test, where it failed to detect any malware that was already running. Its user interface is clean and simple to use.
Bottom line: This Windows computer security software is good at protecting your computer and has minor impact on the system, but it can be somewhat difficult to use. It also comes with a built-in password manager.
Bottom line: This Windows computer security software is good at protecting your computer. But it's somewhat difficult to use, has a moderate impact on the system and comes packaged with adware/greyware.
Bottom line: This macOS computer security software is only just OK at protecting your computer, difficult to use and has moderate impact on the system. However it does have a few good features such as password manager and email scanner.
Bottom line: This Windows computer security software is good at protecting your computer, OK to use and has only a minor impact on the system. It also has a good range of features including ransomware and banking protection and parental controls.
Bottom line: This Windows computer security software is OK at protecting your computer, OK to use and comes with extras like banking protection and parental controls. But it has moderate impact on the system.
Bottom line: This Windows computer security software is good at protecting your computer and it has an email scanner. But it's somewhat difficult to use, has a moderate impact on the system and comes packaged with adware/greyware.
Bottom line: This Windows computer security software is good at protecting your computer, OK to use and has a moderate impact on the system. It also comes with extra features like banking protection and parental controls.
Bottom line: This Windows computer security software is very good at protecting your computer and has minor impact on the system and it has plenty of features including banking protection and a password manager. But it can be somewhat difficult to use.
Bottom line: This macOS computer security software is OK at protecting your computer and it has useful features such as banking protection and parental controls. But it's somewhat difficult to use and has moderate impact on the system.
Bottom line: The macOS system has extremely poor protection from malware and can be difficult to use. As it is part of the operating system, it has little effect on how well the system runs. It does however have some good features such as backup and parental controls.
Bottom line: This macOS computer security software is OK to use and has minor impact on the system, but its only just OK at protecting your computer. It does have some good features such as its own firewall and parental controls.
Bottom line: This Windows computer security software is good at protecting your computer, is OK to use and has only a minor impact on the system. It also has good features such as parental controls and a password manager.
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Why do you need security software? Without it, the data on your computer could be ripe for the taking by hackers or susceptible to viruses, spyware and spam. Some security software also help protect your computer from email scams and malicious websites, which can attempt to access your personal data.
When it comes to protecting your computer, we recommend security software. These types of software offer a raft of protection measures in one package. They are also easier to manage than individual programs as they only require one installation, one regular update and one subscription payment for you to remember.
Separate anti-malware (also known as antivirus) programs can offer similar levels of protection, but to achieve this you need to install multiple programs – such as a virus scanner, malware removal tools and a firewall – and keep tabs on multiple accounts. You also need to update each program individually.
We think you should always use security software – either paid or free – to protect your computer while surfing the internet.
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Before installing any new security programs, ensure your computer’s operating system and all other software has the latest updates.
Microsoft release security patches on the second Tuesday of each month (called Patch Tuesday) and you should get the most recent updates.
Most malware gets on to your computer through email attachments sent by unknown people or by clicking on unsafe links. If you don’t know the sender or website, don’t click!
Though there’s more malware targeting Windows computers, Macs aren’t immune. In 2016, Mac malware infection rates soared 744%, according to McAfee. There are now more than 700,000 malware targeting Macs. We’ve found the macOS operating system (OS) provides almost no protection against malware. macOS also requires an administrator password before allowing changes to the system software. It’s essential to give permission only when you trust the source and know exactly what you’re allowing access.
Security software is released annually, but throughout the year manufacturers continually update the virus database to protect your computer from evolving malware. We now test security software to reflect this. While we assess the basic software package at the beginning of the year, including ease of use and system impact, protection is tested over 5 months.
Our macOS security software test differs from our Windows test in that we couldn’t find enough websites targeting Macs with malware so didn’t run web or ransomware tests for Mac software.
On an ongoing basis:
Security programs are designed to run constantly, but are notorious for slowing down computer performance. We hear of many consumers loading system-hungry security programs on to older machines, which then grind to a standstill.
Some users get so frustrated, they end up removing the software: that’s money down the drain and it exposes your computer to risk.
Before you buy:
Check the software’s minimum system requirements. If your PC only just meets those, look for something else.
Some manufacturers offer free downloadable limited-time trial versions. This gives an indication of what effect the software could have on your computer’s performance.
Some security software have licences that let you use them on more than one computer, but what if you want to protect more than just your home computer? Many security programs have licence options that allow you to cover additional computers and other computing devices (such as smartphones and tablet computers). These “multiple-device” licences are often pricier but can protect a range of operating systems and devices (iOS, Android, Windows and Apple OS X).
A firewall stops this by monitoring data going into and coming from your computer and filtering out malicious connections. These connections can be attempts to take your data, gain control of your computer or to initiate downloading a virus.
Update regularly: threats are continually evolving. Set your operating system and security software to update automatically.
Free programs can be laced with viruses and spyware. Download only from well-known and reputable sites.
Don’t click links from emails, Twitter, Facebook or any other source unless you’re certain of where they came from. This is especially so for “phishing” scams that pretend to be from banks or other organisations. It’s not rude to ask the sender where the link goes if you’re not sure.
Hovering over a link with your mouse will usually reveal (in the bottom left corner of your browser) exactly where the link goes.
Your bank will never send you an email that links to its website. Always access your bank’s website by following an existing bookmark, by typing in its web address or using its official app.
Only install banking apps from the app store. Your bank’s website should direct you there.
Check the site is secured. This will be shown by a padlock icon in the URL address bar or the URL starts with “https”.
Change your password regularly.
Make sure none of your online passwords are the same (for example, your online banking password shouldn’t be the same as your email password).
Always use “strong” passwords that include lower case and upper case letters as well as numbers.
Enable two-factor authentication (2FA) if provided by the bank. The most common form of 2FA sends you a text message when you log into its site.
Never use online banking when connected to public WiFi, unless you’re using a VPN.
Regularly monitor your account for unusual activity.
Some online apps, such as those on Facebook, require accessing your account to work and some malicious apps can be used to “hack” your account (“hack” in this sense simply means to “take over”).
Our advice in examples of hacking, such as the 2013 Xtra email incident, is to check Facebook, Twitter and even your browser extensions for applications that have been added. Remove any you don’t use or you think are suspicious. Options for this can be found under “settings” in most cases.
Software that delivers advertisements on your computer.
This prevents your computer sending data to other websites when it detects you’re using internet banking.
Affects the Master Boot Record of a hard disc, where information about the drive is stored (when you boot from the infected disc, the virus loads before the operating system does).
Short for bot network, also known as a "zombie army", it’s a collection of infected internet-connected computers running unauthorised automated software (called robots or bots) that can distribute spam and viruses and launch attacks on computers or networks.
A software program and/or hardware device that limits outside network access to a computer by blocking or restricting entrances (ports) to your computer.
A generic term for unwanted software that secretly executes unwanted actions.
Constant monitoring of a computer’s memory and file system that activates automatically and scans any file (as it’s opened, closed or moved) to detect virus activity before it can infect the system.
Scanning of selected files as required by a user.
Attempts to lure users to reveal credit card details, account passwords and personal information by pretending to be an email from a trusted financial institution or service.
A virtual opening into your computer through which information can pass in and out. Used for communicating over the internet. Port can also refer to a physical connection point for attaching devices.
The isolation of files suspected to contain a virus, so they can’t be opened or activated.
Ransomware is a particularly nasty type of malware that locks the data on your computer using encryption. It then displays a ransom message asking for payment to release your data. The reality is even if you pay the ransom, your data are unlikely to be released. Regular backups are the best means of recovery as you can roll back your data to before they were encrypted. However, security software is still needed to remove ransomware and protect your computer from further attacks.
Programs that conceal malicious code’s access to files, folders and registry keys (they also make programs, system services, drivers and network connections invisible to the user).
Unsolicited (junk) email distributed on a large scale and often part of a scam.
Software that secretly gathers information about a user from a computer.
A malicious program hidden in a benign application. Often used by hackers to enable access to the victim’s computer.
A software program, script, or macro designed to infect, destroy, modify, or cause other problems with a computer or software program.
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