Computer Security Tips: Practical Checks for Everyday Use

Computer security tips for everyday use: protect accounts, check updates, keep recoverable backups and recognise when a device needs professional help.

Computer security tips start with the accounts you rely on

Start with the account that can reset your other accounts: your email. Give it a unique password, check the recovery details and enable the additional sign in protection offered by the provider. A password manager can help you avoid reusing credentials. Keep its recovery information somewhere you can reach if your computer fails. These computer security tips are useful on a new machine as well as an older one.

Do not share passwords, recovery codes or approval prompts with a caller claiming to be technical support. If a message says an account needs urgent attention, open the service through its usual app or your own saved address. A convincing name and logo are not enough to establish who sent a message. Read our guide to creating secure passwords for the account specific checks.

Keep the operating system and applications supported

Check the update screen on the device rather than trusting an advertisement that offers to update it. Allow ordinary security updates to complete when practical, and restart when the update process requires it. Browsers, office applications and extensions also need attention. Before a major operating system change, check application compatibility and make sure important files are backed up.

A familiar desktop is not proof that the operating system is still supported. Ordinary Windows 10 support ended on 14 October 2025; eligible Extended Security Updates are a separate enrolment route. Support depends on the edition and arrangement. Check the current position before paying for maintenance on an older computer. A faster machine running unsupported software still needs a security plan.

Check protection without stacking conflicting tools

On Windows, open Windows Security to see which protection provider is active and whether it reports a problem. On a Mac, retain the built in security checks and use software from a source you can verify. Do not turn off protection to make an installer or performance test run. If a genuine application is blocked, establish why before changing a security setting.

Installing several products with continuous antivirus scanning is not automatically safer. Their background work can overlap or conflict. Use a supported protection arrangement and resolve warnings through that provider’s own guidance. A scan result is one piece of evidence, not a guarantee that an account or device has never been compromised.

Back up files and protect recovery access

A backup needs to be recoverable, not merely listed as complete. Choose a few important documents and check that you can restore a copy without overwriting the original. Keep an independent copy or suitable version history rather than relying entirely on one live folder. Synchronising a deletion to another device is different from having a protected earlier version.

Use the device’s supported encryption options where appropriate and keep recovery keys separately. Encryption helps protect stored files if a device is lost; it does not replace a backup or stop a signed in user from opening a harmful file. Do not change encryption settings immediately before repair without checking how you will regain access afterwards.

Make computer security tips part of a simple routine

Review the devices and accounts you actually use. Remove an extension you no longer need through the browser’s own controls, check an unfamiliar application before granting permissions, and confirm that your backup has recently completed. Avoid broad registry cleaners, unexplained terminal commands and advertised one click fixes. Keep a short note of anything you change so you can recognise a new problem afterwards.

For a family computer, explain how to report a suspicious message without embarrassment. For a work device, follow the organisation’s support and reporting process before removing software or changing account access. The right next step depends on who manages the device and the information it holds.

If something already looks wrong

If files become unreadable, an unexpected remote session appears or an account sends messages you did not write, stop experimenting. Record the warning without including passwords or private documents, and contact the appropriate support provider. Use another trusted device to review an affected account when necessary. Ask your workplace before connecting a suspect work device to another network.

Kingfisher can discuss the symptoms, device and data priorities before agreeing an assessment. Tell us what happened, what you clicked and whether important files have an independent backup. These computer security tips help with prevention; suspected compromise needs a separate response. We do not need your passwords or verification codes in a contact message.

Choose one relevant check you can complete and understand. For a suspected compromise, use an appropriate response process instead of routine maintenance.

For the primary guidance behind these checks, read NCSC’s practical online security guidance.