No one wants a computer wide open to the various threats and nasties that lurk on the web, and you could be forgiven for thinking that the fight against hackers, malware and viruses is pretty much futile, considering how often they hit the tech news headlines.
In fact you can minimise a lot of the risk by taking some simple and straightforward steps to protect yourself. No system is ever 100 percent guaranteed safe - there are just too many variables for that - but follow this guide and you can sleep much more easily at night.
1. Keep your software updated
It's boring, but it's effective: make sure your operating system and all the programs that run on it (especially your browser, email client and antivirus application) are always updated with the latest patches and upgrades. This makes sure any existing security threats are protected against and gives you a good chance of standing up to new ones.
Software updates are so important that the likes of Windows, macOS, and all the popular web browsers now make it very difficult to avoid updating your stuff (that's why Windows reboots even when you've told it not too). It's always worth double-checking that automatic updates have been set up though, so run an audit through your programs.
2. Install an antivirus program
You can risk it and just about get by without an antivirus program these days but we'd still very much recommend you install one, even if it's just activating the Windows Defender software that comes as part of Windows 10. You've got lots of decent programs to pick from, including packages from Bitdefender, AVG, Kaspersky, Norton and numerous others.
On macOS the debate continues to drag on about whether antivirus software is really necessary but there's no doubt that the threats are real, so you've got no one but yourself to blame if you get caught out. The same big names in Windows security (see above) also have products for macOS, all ready to add extra protection beyond what Apple provides.
3. Set up VPN software
VPN (Virtual Private Network) software is of most use when you're on public Wi-Fi, but it also has its place at home, encrypting the data flowing to and from your computers and making it harder for anyone sniffing around your network to see what you're doing. It also makes it more difficult for websites, ISPs and governments to log your online activities.
We've covered the best VPNs out there in depth elsewhere, but it's a good idea to pay for a service so you're guaranteed of getting a decent service, and you've got a bit more peace of mind about how the VPN is funding itself. Take your time in making your pick, because you're ultimately trusting your chosen VPN provider with details of your browsing activity.
4. Create your own user account
Even if you're the only person who uses your computer, set up a user account to protect it from anyone who should wander past your living room or indeed pick up your laptop on a bus. Assuming your browser logs you into a bunch of sites automatically, a username and a password in Windows or macOS are your last line of defence against unwelcome visitors.
You should also make sure your computer is set to log you out automatically after a certain period of inactivity, for the same reason - on Windows, this is done via Sign-in options under Accounts in Settings; on macOS, head to Security & Privacy from System Preferences and open the General tab (you also need to set a short timeout in both cases).
5. Be careful what you click on
Even with the best security setup in the world, malware can still infect your computer if you give it explicit permission to run, and so you should be careful about the web links, email attachments, and social media messages you click on. Your browser and OS will protect you against the worst threats, but you carry some of the responsibility too.
Be very wary of anything that comes through social media or over email that's unexpected or arrives without any context (if necessary double-check with the supposed sender). If you follow a link to your web browser, check that it opens the URL you were expecting, and look for the green padlock that's a sign of a secured HTTPS site that you can trust.
6. Protect your accounts
Hackers will often get into your accounts through third-party extensions (all those sites you've logged into via Facebook): open up your Facebook, Twitter and other accounts and disconnect apps and services you're no longer using to keep yourself better protected.
Where available - and it's available just about everywhere these days - you should switch on two-step authentication for your accounts, so your username, password, and a special PIN code is needed to log in. Here are the instructions for Apple and Google, for example.
7. Secure your home network
Not all the threats you face are going to come from the wilds of the web, and it's important to secure your home Wi-Fi too. As well as setting up a passcode to gain access (of course), you should change the default password to log into the router, which is set by your ISP.
It's a good idea to change your regular password (the one you use to connect devices) on a regular basis to boot off unwelcome visitors. Most routers also let you 'hide' your Wi-Fi too, which means people need to know both the Wi-Fi ID and the password to get online.