How to run a full virus scan
A quick scan is not enough when you are worried. Here is how to run a thorough full scan.
- Update your antivirus. Make sure virus definitions are current before you scan.
- Choose Full Scan. Open your antivirus and pick Full Scan, not Quick Scan — it checks every file.
- Let it finish. A full scan can take an hour or more; leave it running.
- Act on the results. Quarantine or remove anything flagged, then restart your PC.
Quick scan vs full scan
A quick scan checks the places malware usually hides and takes a few minutes; a full scan inspects every file on every drive and can take an hour or more. Run quick scans often and a full scan periodically — or immediately if you suspect an infection or just installed something risky.
How to run one
- Open your antivirus (or Windows Security → Virus & threat protection).
- Choose Scan options and select Full scan.
- Start it and let it run — you can keep working, though the PC may be slower.
- Review the results and quarantine or remove anything flagged.
- If threats are found, run a second full scan after cleaning to confirm the PC is clear.
Keep it automatic
The best protection is the scan you never have to remember. Schedule a weekly full scan for a time your PC is on but idle, and keep real-time protection on so threats are caught as they appear, not just at scan time.
FAQ
How often should I run a full scan?
About once a week is plenty for most people, plus an immediate scan any time you suspect a problem or install software from an unfamiliar source.
Why is my scan so slow?
Full scans read every file, so they take time — longer with more data or an older drive. Schedule them for idle hours so they do not get in your way.