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the claim

Windows 10 and Windows 11 include Microsoft Defender antivirus software built into the operating system.

the verdict
INSUFFICIENT LEANING
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that windows 10 and Windows 11 include Microsoft Defender antivirus software built into the operating system?

Unclear. One reference item indicates Microsoft Defender is deeply integrated into recent Windows versions and almost impossible to uninstall, and a ransomware study mentions Windows Defender tampering on a Windows 11 endpoint. Neither item names Windows 10 or Windows 11 as shipping Defender built in, so the evidence only partially covers the claim.

Verdict: PARTIAL LEAN · 2 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 2
Microsoft Defender Antivirus
Get citation
Microsoft Defender Antivirus. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Microsoft_Defender_Antivirus

See more details
More for · 1
BehaviorGuard: A Host-Based Behavioral Ransomware Detection and Automated Containment System Using Wazuh SIEM and Microsoft Sysmon
2026
Get citation
BehaviorGuard: A Host-Based Behavioral Ransomware Detection and Automated Containment System Using Wazuh SIEM and Microsoft Sysmon. (2026). hal.science. https://doi.org/10.59324/jaitd.2026.2(5).02

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