Note: Microsoft usually defaults the main download page to the latest version (e.g., 23H2). If you specifically need 21H2 and the site has moved on, you may need to use an "unlocked" browser string or the Media Creation Tool method below. 2. Using the Windows 11 Media Creation Tool
: Double-click the downloaded ISO file inside Windows 10 or 11 to mount it as a virtual drive. Double-click setup.exe to begin a seamless upgrade.
This community site provides scripts to download Windows update files directly from Microsoft and package them into a bootable ISO.
Restart the PC and repeatedly press the boot menu key (usually , F9 , F11 , or Esc depending on the motherboard). Select the USB drive from the boot menu.
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Download the open-source tool Rufus from its official repository. Insert your blank USB drive into your PC.
Click . Rufus will prompt options allowing you to bypass specific hardware requirements (like TPM 2.0 or RAM checks) if you are deploying to an older test environment. Option B: Using Ventoy (Ideal for Multi-ISO management) Download and install Ventoy to a USB drive.
Select your preferred (e.g., English International) and click Confirm . Click the 64-bit Download button that generates.
Microsoft typically only offers the of Windows 11 (currently 23H2 or 24H2) on its main software download page . To obtain the specific 21H2 version, you must use alternative methods that still pull files from official Microsoft servers: Note: Microsoft usually defaults the main download page
To successfully run a 64-bit installation of Windows 11, your PC must meet the following hardware criteria: Hardware Component Minimum Requirement
To guarantee your download has not been corrupted or altered during transit, verify its SHA256 checksum against Microsoft's official values. Open on your computer.
Method 2: Microsoft Rufus Integration (Easiest for Older Builds)
Type the command: Get-FileHash "C:\path\to\your\Windows_11_21H2_64bit.iso" (replace with your actual file path). Press . Using the Windows 11 Media Creation Tool :
Select your Language and Edition (ensure is selected).
Microsoft has officially ended support for Windows 11 version 21H2 (original release) on October 10, 2023 . For security and performance, consider using Windows 11 22H2 or 23H2 instead. However, if you specifically need 21H2 (e.g., for legacy software testing or specific hardware), follow the steps below.
Under , look for the build marked 21H2 (Build 22000.xxx).