You can install Windows 11 on unsupported PCs, but Microsoft doesn’t officially recommend it — mainly because older hardware may lack some security features and you might not get full support or certain updates.
That said, there are two main ways people typically do it:
Option 1 — Use Microsoft’s Official “Bypass” Registry Method
This method is from Microsoft’s own documentation and bypasses the TPM 2.0 and CPU checks (but still requires TPM 1.2).
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Back up your data — This process can wipe your PC if you do a clean install.
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Get the Windows 11 ISO
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Download from Microsoft’s official page:
https://www.microsoft.com/software-download/windows11
-
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Create the Registry Key to Skip Checks
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Press Windows + R, type
regedit
, and hit Enter. -
Go to:
HKEY_LOCAL_MACHINE\SYSTEM\Setup\MoSetup
(If
MoSetup
doesn’t exist, right-clickSetup
→ New → Key → name itMoSetup
.) -
Inside
MoSetup
, right-click the right panel → New → DWORD (32-bit) Value. -
Name it:
AllowUpgradesWithUnsupportedTPMOrCPU
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Double-click it, set Value data to
1
, and press OK.
-
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Run the Windows 11 Setup
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Mount the ISO or open the installation media, then run setup.exe.
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Choose “Keep personal files and apps” if you want an in-place upgrade.
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Option 2 — Modify Installation Media
This is for completely unsupported PCs (no TPM at all, legacy BIOS, etc.).
Steps (simplified):
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Download Rufus (USB creation tool) → https://rufus.ie
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Download Windows 11 ISO from Microsoft.
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In Rufus:
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Select your USB drive.
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Choose the ISO.
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Rufus will ask: “Remove requirement for TPM 2.0, Secure Boot, and RAM checks?” → Select Yes.
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Boot from the USB and install as usual.
⚠ Notes & Risks
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Microsoft warns that installing Windows 11 on unsupported devices may result in no security updates (though in practice, many still get them — for now).
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You may face driver issues.
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If the PC is very old, performance could suffer.
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