What you need to check before upgrading to Windows 11

Windows 11 requires specific hardware — a processor from roughly 2017 or newer, at least 4 GB of RAM, and a 64-bit system. Microsoft provides a tool called the PC Health Check app that scans your computer and tells you whether it meets these requirements. You can read it free from Microsoft's website, run it, and get a yes-or-no answer in about a minute.

If the tool says your computer is compatible, you can upgrade. If it says no, the tool will tell you which part is the problem — usually the processor, RAM, or a missing security feature called TPM 2.0. Knowing which part fails matters because it determines whether you can fix it (sometimes you can add RAM) or whether you need a new computer.

You do not need to understand what these parts do to check compatibility. You just need to run the tool and read the result.

Key Takeaways

  • read the PC Health Check app from Microsoft's website, run it, and it will tell you in one minute whether your computer can run Windows 11.
  • Windows 11 requires a processor from around 2017 or newer, 4 GB of RAM minimum, and a security chip called TPM 2.0 that most newer computers have.
  • If the tool says your computer is not compatible, it will show you which part is the problem — processor, RAM, TPM, or something else.
  • Some older computers fail the check because of the processor or TPM, not because they are slow; upgrading those parts is usually not practical, but adding RAM sometimes is.

How to read and run PC Health Check

Go to Microsoft's official Windows 11 system requirements page and look for the PC Health Check read link. Click it, save the file to your computer, and double-click to install it. The installer takes about 30 seconds.

Once installed, open the app. You will see a button that says "Check now" or "Check compatibility". Click it. The app will scan your processor, RAM, storage, and security settings. Within a minute, it will show you a green checkmark (compatible) or a red X (not compatible).

If you see a red X, the app lists which requirement you are missing. Write down what it says — you will need that information if you decide to upgrade a part or buy a new computer.

Understanding the main hardware requirements

Windows 11 needs a processor from Intel's 8th generation or newer, or AMD's Ryzen 2000 series or newer. These came out around 2017 to 2018. If your computer is from 2016 or earlier, it probably will not pass. You can find your processor by right-clicking "This PC" or "My Computer" on your desktop, clicking Properties, and looking for the processor name.

The computer also needs at least 4 GB of RAM. Most computers sold in the last five years have 8 GB or more, so this is rarely the problem. If you have less, adding RAM is one of the few upgrades that is practical and affordable — usually $30 to $60 for 4 GB more.

TPM 2.0 is a security chip that most computers made after 2016 have built in. You cannot see it or touch it — it is part of the motherboard. If your computer has it, the PC Health Check app will find it. If it does not, there is usually no way to add it without replacing the motherboard, which is not practical.

What to do if your computer is not compatible

If PC Health Check says your computer cannot run Windows 11, you have three realistic options. First, you can stay on Windows 10, which Microsoft still supports and will continue to support until October 2025. Windows 10 works fine for most tasks and does not require new hardware.

Second, you can add RAM if that is what failed the check. If the app said you have only 2 GB of RAM and need 4 GB, buying and installing 4 GB more is straightforward and costs $30 to $60. You can watch a video tutorial for your specific computer model on YouTube to see if it is something you feel comfortable doing.

Third, you can buy a new computer. If the problem is the processor or TPM, those cannot be upgraded in most laptops and are impractical to upgrade in desktops. A new computer with Windows 11 pre-installed costs $300 to $500 for basic tasks like email, web browsing, and documents.

Why some computers fail even though they feel fast

A computer can feel perfectly fast and still fail the Windows 11 check. This happens because Windows 11 requires specific hardware features, not just raw speed. An older processor might handle your daily work fine but lack the security features Windows 11 demands.

This is frustrating but intentional — Microsoft built Windows 11 around security improvements that only newer processors have. You cannot work around this by adding RAM or upgrading the hard drive. The processor itself has to be new enough.

If your computer feels slow, that is usually a different problem — a full hard drive, too many programs running at startup, or a failing hard drive. Those issues exist whether you upgrade to Windows 11 or not.

Where to find your processor and other details

Before you run PC Health Check, you can look up your processor yourself. On Windows 10, right-click the Start button, click System, and look for "Processor" in the window that opens. Write down the exact name — for example, "Intel Core i5-7600" or "AMD Ryzen 5 2600".

Then search that processor name online plus "Windows 11 compatible". You will find lists showing whether that exact model passes. This takes five minutes and gives you an answer before you even read the tool.

You can also find your processor by opening Settings, clicking System, then About. The processor name appears under "Device specifications".

Frequently Asked Questions

Can I upgrade my processor to make Windows 11 work?

In most laptops, no — the processor is soldered to the motherboard and cannot be removed. In desktops, it is technically possible but requires opening the case, removing the old processor, installing a new one, and updating the BIOS. This costs $200 to $400 in parts and labor, which is usually more than buying a used compatible computer.

Does Windows 11 run slower on older computers that somehow pass the check?

Not necessarily. If your computer meets the minimum requirements, Windows 11 should run at the same speed as Windows 10. If it feels slower after upgrading, the problem is usually something else — a full hard drive, too many startup programs, or a failing drive — not Windows 11 itself.

What if PC Health Check gives me an error instead of a result?

Try restarting your computer and running the app again. If it still fails, make sure you downloaded it from Microsoft's official website, not a third-party site. You can also check compatibility manually by looking up your processor model online and comparing it to Microsoft's official processor list.

Is Windows 10 still safe to use if I cannot upgrade to Windows 11?

Yes, until October 2025. Microsoft will continue releasing security updates for Windows 10 through that date. After October 2025, Windows 10 will no longer receive updates, so you would need to upgrade to Windows 11 or buy a new computer by then.

Can I check compatibility on someone else's computer using their login?

Yes. read and run PC Health Check on their computer while logged in as them. The tool checks the hardware, not the user account, so it does not matter whose account you use. Just make sure you have permission to install and run software on their computer.