The best antivirus we’ve tested so far

Buying guide: choosing antivirus software

Windows already ships with a competent antivirus

Any honest guide has to start here. Microsoft Defender is built into Windows, costs nothing, updates automatically, and now scores comparably to paid products in independent lab testing. For a careful user who keeps their system updated, it is genuinely adequate.

That reframes the question. You are not choosing between protection and no protection — you are deciding whether a paid suite adds enough on top of a capable free baseline to justify a recurring bill. Sometimes it does: better phishing and scam-link blocking, protection across phones and tablets as well as the PC, ransomware rollback, and support you can actually contact. Sometimes it does not.

The case for paying is strongest for households with several devices and mixed levels of technical confidence, and weakest for a single up-to-date machine used by someone who never clicks unexpected attachments.

Read the independent labs, not the vendor's own numbers

Every vendor publishes detection statistics, and every one of them looks excellent. The useful figures come from independent testing labs that run the same malware samples against every product under identical conditions and publish the methodology alongside the result.

When comparing scores, look at the false-positive column as closely as the detection column. A product that blocks everything including your legitimate software is not protecting you, it is obstructing you — and the usual response to constant false alarms is to disable the software entirely, which is the worst possible outcome.

Also check how recent the results are. Detection engines change constantly, and a product that led the table two years ago tells you little about the version you would install today.

The bundled extras are where the margin lives

Modern antivirus is sold as a "security suite" bundling a VPN, a password manager, cloud backup, a system optimiser, and some form of identity or dark-web monitoring. These bundles are how a product justifies a higher price, and their quality varies enormously.

The bundled VPN is often the weakest link: frequently capped at a low monthly data allowance, limited in server choice, and licensed from a third party rather than operated by the antivirus vendor. If a VPN is something you actually want, compare the bundle against a standalone service before assuming the package is a saving.

System optimisers deserve particular scepticism. Registry cleaning and "PC speedup" have been of marginal value for years, and a tool that reports hundreds of urgent problems on a healthy machine is selling urgency rather than fixing anything.

Renewal pricing and how hard it is to leave

The first year is a loss leader. Discounts of fifty to seventy percent are normal, and the renewal returns to full list price automatically on a card you have already provided. Plenty of people only discover the real cost when the charge appears.

Two things are worth confirming before you buy: what the second year costs, and whether auto-renewal can be switched off from the account page immediately after purchase. Also worth knowing is how cleanly the product uninstalls — some security software embeds itself deeply enough that the standard removal leaves components behind, and the vendor publishes a separate removal tool for exactly this reason.

Before you pay, check these

• Recent independent lab results. Both detection rate and false positives, from a lab that publishes its methodology.
• The year-two price. Find it before you buy, not when the card is charged.
• Auto-renewal you can turn off. Ideally from the account dashboard, on day one.
• Honest device counts. Check whether the licence covers phones and tablets or only desktops.
• Bundled extras judged separately. A capped VPN and a registry cleaner are not worth much; good phishing protection is.
• A documented uninstall path. If the vendor ships a dedicated removal tool, that tells you something.

How we test

We buy the subscriptions at full price rather than accepting review copies, so everything below is based on actually using the product — including the parts that only show up after you've paid, like the renewal price and how hard the software is to cancel or remove.

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