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How to Install Windows 11 Without TPM 2.0 (Bypass Requirements)

6 min read

Windows 11 requires TPM 2.0 and Secure Boot, but older PCs can bypass these requirements. Here are the official and unofficial methods to install Windows 11 on unsupported hardware.

Windows 11 officially requires TPM 2.0, Secure Boot, and a supported CPU. Many capable PCs fail only because of TPM. Here's how to install it anyway — with an understanding of what you're giving up.

Check What's Blocking You

Download and run the official PC Health Check app from Microsoft. It tells you exactly which requirements your PC fails.

Or check via PowerShell:

# Check TPM
Get-Tpm

# Check Secure Boot
Confirm-SecureBootUEFI

If TpmPresent: False or TpmReady: False — your PC either has no TPM or it's disabled in BIOS.

Method 1: Enable TPM in BIOS (Try This First)

Many PCs have TPM but it's disabled by default.

  1. Restart → enter BIOS (Del, F2, or F10 at startup)
  2. Look for TPM, PTT (Intel Platform Trust Technology), or fTPM (AMD firmware TPM)
  3. Enable it → save and exit

After enabling, run PC Health Check again. If it now passes — install Windows 11 normally.

Method 2: Registry Bypass (Microsoft's Own Workaround)

Microsoft documented this bypass for organizations. It skips TPM and RAM checks but still requires Secure Boot and a supported CPU.

reg add "HKLM\SYSTEM\Setup\MoSetup" /v AllowUpgradesWithUnsupportedTPMOrCPU /t REG_DWORD /d 1 /f

Then run the Windows 11 installer normally. This works for upgrades from Windows 10.

Method 3: Rufus (Clean Install, Full Bypass)

Rufus is a free tool that creates installation USB drives with the TPM requirement removed.

  1. Download Rufus (free, no install needed)
  2. Plug in a USB drive (8GB+)
  3. In Rufus: select your Windows 11 ISO → under Image option select Extended Windows 11 Installation (no TPM / no Secure Boot)
  4. Click Start

Boot from the USB and install Windows 11 — no TPM, no Secure Boot check.

Method 4: appraiserres.dll Removal (During In-Place Upgrade)

For upgrading without using Rufus:

  1. Mount the Windows 11 ISO (double-click in Windows Explorer)
  2. Copy the entire ISO contents to a folder on your PC
  3. Delete or rename sources\appraiserres.dll
  4. Run setup.exe from that folder

The installer skips hardware compatibility checks.

What You Lose on Unsupported Hardware

Microsoft is clear about this: PCs that bypass requirements may not receive future Windows 11 updates — including security patches. Currently updates still work, but Microsoft reserves the right to stop them.

You also won't get support from Microsoft if something goes wrong.

Practically speaking: most people bypass these requirements without issues. But be aware of the tradeoff.

Should You Do This?

Yes, if:

  • Your PC is fast enough (runs Windows 10 well)
  • You have no TPM but everything else is fine
  • You want to avoid buying new hardware just for an OS requirement

No, if:

  • Your PC is slow on Windows 10 already
  • You're in a business or corporate environment
  • Security updates stopping matters to you

Check TPM Status After Installing

Get-Tpm | Select-Object TpmPresent, TpmReady, TpmEnabled

If you bypassed TPM, this will still show your TPM status — if TPM is present but was disabled in BIOS, you can enable it later without reinstalling.

Summary

Try enabling TPM/fTPM in BIOS first — many PCs already have it disabled. If that fails: use Rufus with the extended Windows 11 option for a clean install, or the registry tweak for an upgrade. Be aware that Microsoft may restrict updates on unsupported hardware in the future.

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