Windows 11 version 26H2 started rolling out on 29 September, and plenty of PCs are picking it up this month. A big update is a good excuse to open the one app most people never look at: Windows Security. It's built into Windows 10 and 11, it's free, and it's where Microsoft keeps the switches for antivirus, ransomware protection, phishing warnings and a handful of deeper protections that aren't always on.

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