Windows 11 Without TPM: Check, Enable or Work Around TPM 2.0

Windows 11 without TPM: understand the block before acting

You start the upgrade and the verdict falls: “This PC can’t run Windows 11”. Before looking for a way to install Windows 11 without TPM, run one check: in many cases, the TPM 2.0 chip that Microsoft requires is present in the machine, just disabled in the BIOS.

Three very different situations hide behind this message:

• The TPM exists but is disabled: very common on self-built PCs, whose motherboards often ship with the feature turned off. Two minutes in the settings are enough.
• The TPM is version 1.2, or the processor is not on the official list: the machine works perfectly well, but Microsoft classes it as unsupported. Tolerated workarounds exist.
• The PC really is too old, with no TPM at all: you then have to choose between staying on Windows 10 and changing machines.

One thing never varies: the license is not the problem. Windows 11 Home costs 8,90 €, Windows 11 Pro costs 9,90 €, and the key activates the same way whatever the PC. The whole question is about hardware, never about the license.

What TPM 2.0 does, and why Microsoft requires it

The TPM (Trusted Platform Module) is a hardware safe that keeps encryption keys out of reach of the operating system and of malware. In practice, it:

• protects the disk encryption keys used by BitLocker;
• secures PIN or face sign-in with Windows Hello;
• checks at each start that the system has not been tampered with;
• isolates Windows credentials from theft attempts.

By requiring version 2.0 for Windows 11, Microsoft sets a minimum security baseline for every PC: restrictive for older machines, but genuinely effective against modern attacks.

Dedicated chip or firmware TPM: two forms of the same component

The TPM is not necessarily a chip soldered onto the motherboard. Since the mid-2010s, it is usually built into the processor itself: Intel calls it PTT (Platform Trust Technology), AMD calls it fTPM. That is why so many PCs reported as “incompatible” actually have a fully working TPM 2.0: the feature is there, in the processor, but disabled at the factory on many motherboards.

Check whether your PC has a TPM: two minutes are enough

Method 1: the tpm.msc console

1. Press Windows + R.
2. Type tpm.msc and press Enter.
3. Read the “Specification Version” line: if it shows 2.0, the requirement is met.

If the console says “Compatible TPM cannot be found”, do not conclude too quickly: the TPM is either absent or simply disabled in the BIOS. The next step happens at restart.

Method 2: Windows Security

Open Settings, then Privacy & security, Windows Security and Device security. A “Security processor” section confirms an active TPM and shows its version.

Method 3: the PC Health Check app

This free Microsoft tool lists precisely which criteria are blocking: TPM, Secure Boot, processor, memory. It is a reliable way to know whether your problem is limited to the TPM, in which case it can be fixed for free, or whether the processor is also involved.

Enable TPM in the BIOS/UEFI, step by step

If the TPM is disabled, everything happens in the BIOS (called UEFI on recent machines). The change is reversible and harmless to your data:

1. Restart the PC and repeatedly press the BIOS access key as soon as it powers on (see the table below). Alternative route: Settings, System, Recovery, Advanced startup, then Troubleshoot, Advanced options, UEFI Firmware Settings.
2. Browse the Security, Advanced or Trusted Computing menus.
3. Enable Intel PTT (Intel processor) or AMD fTPM (AMD processor), sometimes named “TPM Device” or “Security Device Support”.
4. Check Secure Boot while you are there: Windows 11 requires Secure Boot-capable firmware, and turning it on is recommended.
5. Save (usually with F10) and restart.
6. Back in Windows, run tpm.msc again: version 2.0 should now appear.

Special case: if your disk uses MBR partitioning (a Legacy mode installation), it must be converted to GPT before Secure Boot can be used. Microsoft’s built-in MBR2GPT tool does this without reinstalling, but a fresh install is often the simpler route: our complete guide to formatting and reinstalling Windows 11 covers creating the USB drive and every step up to the desktop.

Once the TPM is active, a PC that is otherwise compatible is offered the upgrade through Windows Update, with no workaround and no hack.

Installing Windows 11 on an unsupported PC: possible, with eyes open

Processor missing from the official list, TPM limited to version 1.2, or no TPM at all: methods to get around the Windows 11 TPM check exist and are widely documented, such as a registry change during setup or installation media prepared to skip the checks. We deliberately do not detail them here: they change from one Windows version to the next, and an outdated tutorial does more harm than good. Note also that recent versions of Windows 11 need processor instructions that very old CPUs lack, so some machines cannot run it at all.

What matters is knowing what you accept by installing Windows 11 without a compliant TPM 2.0:

• Microsoft tolerates these installations: the system installs, runs and activates normally.
• No guaranteed updates: the configuration is officially unsupported. Security fixes have reached these machines so far, but Microsoft makes no commitment, and the big yearly upgrades may require repeating the procedure.
• A warning may appear in Settings or on the desktop, reporting an unsupported configuration.
• No official support for problems related to this installation.

Our view, plainly: to extend the life of a secondary PC that still runs well, the compromise is defensible. For the main machine holding your documents, photos and accounts, prefer an officially supported configuration.

And the license in all this?

This is a widespread misunderstanding: there is no “special edition” of Windows 11 for unsupported PCs. The TPM check is purely about hardware and has nothing to do with the product key. A Windows 11 key from 8,90 € activates on Microsoft’s official servers in exactly the same way, whether the PC is officially compatible or not.

A PC that is really too old: two serious alternatives

On a machine from before roughly 2014 or 2015, with no TPM at all, a workaround becomes a gamble: tired hardware, abandoned drivers, weaker performance. Two realistic options remain.

Option 1: stay on Windows 10, knowingly

Windows 10 keeps working, but its standard support ended in October 2025: without special measures, there are no more security fixes. Acceptable for a backup or offline PC, risky for daily connected use. Our page on Windows 10 end of support details what changes in practice and the options that remain.

And to be clear: if your Windows 10 is already activated, buy nothing. A Windows 10 key such as Windows 10 Pro at 9,90 € only makes sense to reinstall a used machine sold without a license.

Option 2: change machines without overpaying for the license

A recent refurbished PC ticks every Windows 11 box for a fraction of the price of a new one, but it is often sold without a license or with an unactivated system. That is exactly where an affordable key makes sense: Windows 11 Home at 8,90 € for family use, or Pro at 9,90 € for BitLocker and Remote Desktop; our Windows 11 Home vs Pro comparison helps you decide. To equip the machine from A to Z, the Windows 11 Pro + Office 2021 Pro Plus bundle at 24,90 € covers system and office suite in one purchase.

Summary, situation by situation

The license is never the problem

Whatever path you take (enabling the TPM, an accepted workaround or a new machine), the license is the easy part of the operation:

• Windows 11 Home: 8,90 €
• Windows 11 Pro: 9,90 €
• Windows 10 Pro: 9,90 €
• Windows 11 Pro + Office 2021 Pro Plus bundle: 24,90 €

The key arrives by email within minutes, activates on Microsoft’s official servers and is a perpetual license, valid for life. Payment is secure, by card, Apple Pay, Google Pay or Bancontact, every order comes with an invoice showing VAT, and a defective key is replaced free of charge, for life.