: Microsoft retired support for these consumer editions on June 13, 2023 . They no longer receive monthly security updates.

Since most standard editions of Windows 10 version 21H2 no longer receive security updates, running this version poses a significant security risk. It is to continue receiving critical security patches and new features. Even Windows 10 version 22H2, the final version of Windows 10, will reach its end of support on October 14, 2025 .

Restart the PC and repeatedly tap your system's boot menu key (common keys include depending on the motherboard manufacturer). Select your USB flash drive from the boot override list. Step 3: Complete the Windows Setup

Open , insert your flash drive, and select your 21H2 ISO.

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Note: For a clean install (via ISO), Microsoft raised the minimum storage requirement to 32GB for new devices to ensure space for updates and apps.