Free tool

PC Virus Check & Scan

An 8-point symptom self-check that tells you how likely an infection is, then walks you to the official free scanners from Microsoft and ESET. This tool runs no code on your computer.

PC virus check & scan

A safe, guided check: answer 8 questions, get a risk read, and be walked to the official free scanners from Microsoft and ESET. This tool runs no code on your computer — it's a checklist plus official download links.

Unexpected pop-ups or ad windows, even when no browser is openPrograms in Task Manager you don't recogniseBrowser homepage or search engine changed by itselfThe computer is far slower than usual for no obvious reasonFans running hot constantly, even when idleWebpages redirecting to sites you didn't ask forFiles missing, renamed or encrypted — or a ransom messageYour antivirus keeps warning and you can't get it to clear

Official free scanners (safe, reputable)

RECOMMENDED FIRST

Microsoft Safety Scanner

Official Microsoft tool. One-off deep scan, no permanent install. Works alongside Windows Defender.

Get it from Microsoft

Microsoft Defender Offline

Reboots into a clean environment before scanning — the right tool when something is deeply embedded.

How to run it

ESET Online Scanner

A second opinion from ESET's lab — free one-off scan, independent of what Windows Defender finds.

Get it from ESET

If a scan finds something, or files were encrypted: stop using the machine for banking or email, don't pay any ransom, and book our virus & malware removal — full removal plus the account hardening that stops it coming back. From $125, no clean no charge.

More free tools

Internet Speed Test Connection Speed Diagnostic Password Strength Checker Email Security Check

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