Check your computer's processor, RAM, and storage first

Windows 11 requires specific hardware. Your processor must be on Microsoft's official supported list, your computer needs at least 4 GB of RAM (8 GB is safer), and you need 64 GB of storage space free. The processor requirement is the most common reason a computer cannot run Windows 11 — many machines from 2015 to 2017 have processors that Windows 11 will reject, even if everything else meets the standard.

You can check what processor your computer has without opening it. On Windows 10, press the Windows key and type "System Information" into the search box. Open the result. Look for "Processor" in the list — it will show the exact model name and number. Write down the full name. Then visit Microsoft's official Windows 11 processor list at microsoft.com/windows/windows-11/processors and search for your exact processor model. If it appears on the list, your processor is supported. If it does not appear, Windows 11 will not install on your machine, regardless of RAM or storage.

Key Takeaways

  • Your processor must appear on Microsoft's official supported processor list — this is the most common reason computers cannot run Windows 11.
  • You need at least 4 GB of RAM and 64 GB of free storage space, though 8 GB of RAM is more practical for actual use.
  • Windows 11 requires TPM 2.0 (a security chip), which is built into most computers made after 2016 but may need to be turned on in your BIOS settings.
  • You can check your processor model in System Information and verify it against Microsoft's list in under five minutes.
  • If your computer does not meet the requirements, Windows 10 remains supported and functional, and upgrading the processor usually means buying a new computer.

How to find your RAM and storage space

RAM and storage are easier to check than the processor. In System Information (the same window where you found your processor), look for "Installed RAM" — this shows how much memory your computer has. Windows 11 needs at least 4 GB, but if you use your computer for web browsing, email, and office work, 8 GB is the practical minimum.

For storage, open File Explorer and right-click on your C: drive (usually labeled "Windows" or your computer name). Select "Properties." The bar at the bottom shows how much space is used and how much is free. Windows 11 needs 64 GB of free space to install. If you have less than 64 GB free, you can delete old files, programs you do not use, or move photos and videos to an external drive before attempting installation.

Check for TPM 2.0 and UEFI firmware

Windows 11 also requires TPM 2.0, a security chip that prevents certain types of malware. Most computers built after 2016 have TPM 2.0, but it is sometimes turned off in the BIOS (the firmware settings that run before Windows starts). To check whether your computer has TPM 2.0 and whether it is turned on, press the Windows key and type "tpm.msc" into the search box. Open the result. If you see "TPM 2.0" listed, you have it and it is active. If you see nothing or an older version number, you may need to restart your computer and enter the BIOS to turn it on.

Entering the BIOS varies by computer manufacturer. Restart your computer and watch the screen carefully as it boots — you will usually see a message like "Press F2 to enter Setup" or "Press Delete to enter BIOS." Once inside, look for a setting called "TPM," "PTT," "Security Chip," or "fTPM" (the exact name depends on your manufacturer). Turn it on, save your changes, and restart. If you are not comfortable doing this, a computer repair shop can do it in minutes.

Use Microsoft's PC Health Check tool

Microsoft offers a free tool called PC Health Check that tests your entire system against Windows 11 requirements in one step. read it from microsoft.com/windows/windows-11/windows-11-system-requirements. Run the tool and it will tell you whether your computer can run Windows 11 and which components, if any, do not meet the standard.

The tool is straightforward — it takes about two minutes to run and shows you a clear pass or fail for each requirement. If it says your processor is not supported, that is final; no workaround exists. If it flags TPM 2.0 or UEFI firmware, those can sometimes be fixed by changing BIOS settings. If it flags RAM or storage, those can be upgraded on some computers (though upgrading RAM on a laptop is often difficult or impossible).

What to do if your computer does not meet the requirements

If your processor is not on the supported list, Windows 11 cannot be installed on your computer. Upgrading the processor means replacing the motherboard as well, which is usually more expensive than buying a new computer. Windows 10 remains fully functional and supported, and you can continue using it for years.

If the only issue is RAM or storage, you have options. Adding RAM is possible on most desktop computers and some laptops — a computer repair shop can tell you whether yours can be upgraded and how much it costs. Adding storage is usually cheaper; you can buy an external hard drive or replace the internal drive if your computer has a removable one. Before spending money on upgrades, ask a technician whether the upgrade is practical for your specific model.

Processor lists and where to find them

Microsoft maintains separate supported processor lists for Intel and AMD chips. The Intel list includes 8th generation Core processors and newer (Core i3, i5, i7, and i9 from 2017 onward), as well as certain Pentium and Celeron models. The AMD list includes Ryzen 1000 series and newer, plus certain EPYC and Threadripper models. Older processors — including Intel 7th generation Core chips and AMD Ryzen 1000 series — are not supported.

If you are unsure which generation your processor is, the model number usually tells you. Intel Core i5-8400 means 8th generation (the "8" is the generation). AMD Ryzen 5 3600 means 3000 series (the "3" indicates the generation). Once you know the generation, you can verify it against Microsoft's list. The lists are updated occasionally, but they change slowly — a processor that is not supported today will not become supported later.

Frequently Asked Questions

Can I upgrade my processor to run Windows 11?

Not practically. Upgrading a processor requires replacing the motherboard as well, which costs more than buying a new computer. If your processor is not supported, Windows 11 is not an option for your current machine. Windows 10 will continue to work and receive security updates until October 2025.

What if I have enough RAM and storage but my processor is too old?

The processor requirement is non-negotiable. Windows 11 will not install on an unsupported processor, even if every other component exceeds the requirements. You cannot work around this with upgrades or workarounds.

Do I need to upgrade to Windows 11 right now?

No. Windows 10 is fully supported and will remain so until October 2025. If your computer cannot run Windows 11, you can continue using Windows 10 safely. Plan to upgrade your computer (not just the operating system) when Windows 10 support ends or when your current machine fails.

Can I turn on TPM 2.0 myself if it is disabled?

You can try. Restart your computer, enter the BIOS (usually by pressing F2 or Delete during startup), find the TPM setting, and turn it on. If you are not comfortable with BIOS settings, a computer repair shop can do this in minutes for a small fee.

Is 4 GB of RAM really enough for Windows 11?

Windows 11 will install and run on 4 GB, but it will be slow. For web browsing, email, and office work, 8 GB is the practical minimum. If you use video editing, photo work, or run many programs at once, 16 GB is better. Check whether your computer allows RAM upgrades before buying.