Windows 11 has stricter requirements than Windows 10, and TPM trips up a lot of people. Here’s what you actually need.
The core requirements
You need a supported 1GHz+ 64-bit processor (2+ cores), at least 4GB RAM, 64GB storage, UEFI firmware with Secure Boot capability, and TPM version 2.0.
A DirectX 12 compatible graphics chip and an 720p+ display round it out.
The TPM 2.0 sticking point
TPM 2.0 is the requirement that blocks most older PCs. Many machines have it disabled in BIOS rather than missing — enabling it can be enough.
Check your BIOS/UEFI for a TPM or ‘PTT/fTPM’ setting.
How to check your PC
Run Microsoft’s PC Health Check app for an instant verdict, including which requirement (if any) you’re failing.
If you only fail Secure Boot or TPM, a BIOS change may fix it.
Frequently Asked Questions
What blocks most upgrades?
TPM 2.0 — often it’s just disabled in BIOS.
How much RAM do I need?
At least 4GB, though more is recommended.
How do I check compatibility?
Run the PC Health Check app.
The key requirements
Windows 11 needs a compatible 64-bit CPU (Intel 8th-gen or newer, or equivalent AMD/Qualcomm), 4 GB RAM, 64 GB storage, UEFI with Secure Boot, and — the one that trips most people up — TPM 2.0.
Most PCs from 2018 onward meet these, but TPM is sometimes disabled in BIOS by default.
How to check your PC
Run Microsoft’s PC Health Check app for a clear pass/fail, or open tpm.msc to confirm TPM 2.0 is present and enabled. If TPM shows as missing, it can often be turned on in your BIOS/UEFI settings.
If your CPU is unsupported, Windows 11 may still install but Microsoft does not guarantee updates on unsupported hardware.
Why is TPM 2.0 required?
It underpins Windows 11 security features like BitLocker and secure boot.
How do I know if my PC qualifies?
Run the free PC Health Check app for an instant compatibility result.
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