Checkup

Draft NOINDEX expansion 2026-08-10; overall scores unpublished

Published by By SecurityChecklist

Reviewed Independent reviewer role open

Experts policy

How to Enable Windows Defender

Healthy Defender first: SecurityChecklist keeps this draft free-first and claim-safe. On modern Windows, confirm built-in protection is on before paying for a second real-time engine. Optional paid cards use claim-ledger prices from 2026-08-09 (Bitdefender Antivirus Plus from $24.99/yr first year; Malwarebytes from $59.99/yr). Overall scores stay unpublished (N/Pub). Who should not buy: anyone who has not confirmed OS updates and built-in protection, anyone stacking multiple always-on engines, or anyone who needs published lab detection rates before deciding.

Start Antivirus Finder →
  • Guide · Free-first · Draft NOINDEX

Fastest free path

  1. 1Open Windows Security via system settings (bookmark/search, not random ads)
  2. 2Turn on real-time protection if it was disabled
  3. 3Run Windows Update and a quick Defender scan
  4. 4Remove conflicting always-on AV leftovers if present
  5. 5Consider paid tools only for a clear leftover job
Start Antivirus Finder →

Step-by-step guide

  1. 1

    Turn real-time protection on

    Free

    In Windows Security, confirm Virus & threat protection is enabled. If another AV disabled Defender, uninstall leftovers carefully or keep a single real-time product.

    • Open Windows Security
    • Enable real-time protection
    • Avoid stacking multiple always-on engines
  2. 2

    Patch and scan

    Free

    Install Windows updates. Run a Defender quick scan. Cloud-delivered protection and automatic sample submission settings should match your comfort level.

    • Install pending Windows updates
    • Run a Defender scan
    • Confirm definitions are updating
  3. 3

    Optional paid tools later

    Optional paid

    Paid antivirus earns a seat for multi-device suites or cleanup workflows after Defender is healthy. It is not a substitute for patching.

    • Name the leftover job before buying
    • Prefer one real-time engine

What cannot always be removed

  • Threats that require offline rescue media
  • Unpatched zero-days
  • Invented Defender detection rates

Sources

  • Microsoft Defender / Windows Security docs, Official Microsoft support articles for enabling protection; verify same-day
  • Bitdefender claim ledger, data/claim-ledgers/bitdefender.json#bitdefender-starting-price; from $24.99/yr first year captured 2026-08-09
  • Malwarebytes claim ledger, data/claim-ledgers/malwarebytes.json; from $59.99/yr captured 2026-08-09
  • Overall scores unpublished (N/Pub), No invented lab scores, detection rates, or aggregate ratings on Batch39/40/41 drafts
  • Vendor marketing pages, bitdefender.com / malwarebytes.com feature and pricing claims, not independent lab evidence
  • Security Checklist methodology, How antivirus pages are structured before scores and detection rates publish, /methodology/
  • Claim ledger (T014), data/claim-ledgers/bitdefender.json + malwarebytes.json, starting prices verified 2026-08-09; lab scores unpublished

Next steps

Frequently asked questions

Internal links

Continue in this cluster

Hub, tools, and related pages from the inventory. No invented URLs.

Expert guides & insights

Related guides

Stay in the same problem space without jumping brands.

Want launch updates?

The email newsletter is not running yet. Use Contact if you want a human reply when it opens. No fake signup form.

Contact SecurityChecklist