Windows 11 Compatibility: Your Essential Guide for Refurbished Laptops and PC's

Microsoft ended support for Windows 10 on 14 October 2025 [1]. If you are still running it, your PC still works, but it stopped receiving the monthly security updates that keep it safe on the internet.

So the question stopped being "should I upgrade?" and became "can this machine upgrade at all?" For most people that comes down to one number, and you can read it in about ten seconds.

Key takeaways

• The processor decides it. Windows 11 needs an 8th-generation Intel Core chip or newer, or an AMD Ryzen 2000 series or newer [2][3].
• You also need TPM 2.0 and Secure Boot. These are often present but switched off in the BIOS, which is the single most common false "your PC can't run Windows 11" result.
• If your PC genuinely cannot upgrade, you have real options beyond buying a new one, including Microsoft's paid Extended Security Updates programme [4].
• Running Windows 11 on unsupported hardware is possible but Microsoft advises against it, and those machines may not receive updates.

The ten-second check

This is the rule the checker above applies. Find the processor model in your PC's specifications, or in any listing you are looking at, and read the digits after the dash.

The rule: for four-digit Intel model numbers the first digit is the generation, and for five-digit numbers it is the first two [3]. An i5-8250U is 8th generation and qualifies. An i5-7200U is 7th generation and does not, however good the rest of the specification looks.

Two honest exceptions, because the internet repeats both incorrectly:

• The old "some 7th-gen chips work" advice is out of date. Microsoft briefly listed one 7th-generation processor for a specific Surface model. There is no 7th-generation Core entry on the current supported list [2].
• Intel's X-series is the real exception. High-end desktop chips such as the i7-7800X and i9-7900X carry 7000-series numbers but appear on Microsoft's list as the Core 7000X series, and are supported [2]. These are workstation and enthusiast desktop parts, not laptop chips.

Checking a machine you are thinking of buying? Our Windows 11 laptops are filtered on exactly this rule, so every unit in that range clears the processor requirement.

The full requirements

The processor eliminates most machines, but it is not the only condition [2]:

Microsoft's minimums for memory and storage are genuinely minimal. A machine with exactly 4GB of RAM and a 64GB drive will install Windows 11 and then struggle with it. Treat 8GB and 256GB as the practical floor.

How to check your own PC

Three ways, from quickest to most detailed:

1. Read the CPU number. Press the Windows key, type System Information, and look at "Processor". Apply the table above.
2. Check TPM directly. Press Windows key + R, type tpm.msc and press Enter. If it reports "The TPM is ready for use" and a specification version of 2.0, you are fine. If it says no compatible TPM was found, see the next section before assuming the worst.
3. Run Microsoft's PC Health Check app. It gives a yes or no with a reason. It is the authoritative answer for your specific machine.

If the check fails but your processor is supported

This is worth pausing on, because a lot of perfectly capable machines get written off here.

Business laptops from the 8th generation onwards almost always have TPM 2.0 hardware. What they often do not have is TPM and Secure Boot switched on, particularly ex-corporate machines that were imaged years ago under a legacy BIOS configuration.

Both are BIOS settings. Restart, enter BIOS or UEFI setup (usually F2, F10 or Delete during boot, depending on manufacturer), and look for TPM, which may appear as "Security Device", "PTT" on Intel systems or "fTPM" on AMD, plus a Secure Boot option. Enabling both is often the entire fix.

One caution: switching a machine from legacy BIOS to UEFI mode after Windows is installed can stop it booting if the drive is partitioned the wrong way. If the machine is working and you are not confident, this is a reasonable point to ask someone who is.

If your PC genuinely cannot run Windows 11

You have five real options, and buying a new machine is only one of them.

1. Extended Security Updates. Microsoft runs a consumer ESU programme that continues delivering security updates for Windows 10 [4]. Enrolment is free if you sync your PC settings, or available via Microsoft Rewards points or a one-off payment (USD 30, set by Microsoft), and the programme runs to October 2027. It requires Windows 10 version 22H2 and a Microsoft account. This is the sensible choice if you need a bit more time rather than a permanent answer.

2. Move to Linux. Distributions such as Linux Mint or Ubuntu run comfortably on hardware Windows 11 rejects, and are actively supported. If the machine is used for browsing, email and documents, this costs nothing and works well.

3. ChromeOS Flex. Google's free version of ChromeOS installs on older PCs and laptops. It suits a machine that mostly lives in a browser, and it is genuinely simple for a non-technical user.

4. Keep it offline for one job. An unsupported OS is a risk because of what it is exposed to. A machine that never touches the internet, running a piece of legacy software or driving a specific bit of equipment, remains perfectly serviceable. We keep Windows 10 machines available for exactly this kind of use, where a customer needs software that was never certified for Windows 11.

5. Replace it. If it is your main computer and it connects to the internet daily, this is the honest answer. It does not have to mean buying new: the ex-lease market is full of 8th-generation and newer business machines that clear the requirement comfortably. Our guide on how to choose a refurbished laptop covers what else to look at once the processor question is settled.

Checking a fleet rather than one machine

If you are responsible for twenty or two hundred machines rather than one, the same rule applies but the method changes. Do not check them individually.

Most organisations already have the answer in their asset register: pull the processor model for every device and sort by generation. Everything 8th-generation Intel or Ryzen 2000 and newer is a candidate; everything older is a replacement decision. That single sort usually splits a fleet into three obvious groups, and the middle group, machines that are supported but have TPM disabled, is the one worth spending time on because those are free wins.

Two things worth planning for. First, the machines that fail are not worthless, and they should not go to landfill by default: ex-corporate hardware retains resale or trade-in value, and disposal carries data-security obligations. Second, replacement does not have to mean buying new. The IT asset disposal side and the refurbished-replacement side of this are usually the same conversation, and treating them together is what makes the numbers work.

What about installing Windows 11 anyway?

It can be done on unsupported hardware with registry changes or modified installation media. Microsoft advises against it, and is explicit that such devices are not guaranteed to receive updates, including security updates.

That last part matters, because avoiding an unsupported operating system was the entire reason for upgrading. Installing Windows 11 in a configuration that may not receive security updates does not solve the problem you started with. For a secondary or experimental machine it is a reasonable thing to try. For your main computer it is not.

Buying a refurbished machine that already qualifies

If you are replacing rather than upgrading, this is the easy part. Ex-lease business laptops from the 8th generation onward are plentiful, were built for durability rather than a retail price point, and clear the Windows 11 processor requirement without argument.

Check the processor number in the listing using the table above, confirm the seller states the machine ships with Windows 11 already installed, and confirm the licence is genuine. Our full range is at refurbished laptops, and if you want to skip the checking entirely, Windows 11 laptops is filtered on the processor rule. If you are weighing up whether refurbished is right for you at all, we covered that separately in our piece on the myths around refurbished laptops.

Frequently asked questions

Is Windows 10 still safe to use?

Not without extra steps. Microsoft ended support on 14 October 2025 [1], so Windows 10 no longer receives the routine security updates that patch newly discovered vulnerabilities. The machine keeps working, but the risk grows over time. If you need to stay on Windows 10, enrol in the Extended Security Updates programme [4] rather than simply carrying on.

How do I know if my processor supports Windows 11?

Read the model number. For four-digit Intel numbers the first digit is the generation, and for five-digit numbers it is the first two. An 8th-generation chip or newer qualifies, as does AMD Ryzen 2000 series or newer [2][3]. So an i5-8250U works and an i5-7200U does not. Microsoft publishes the full supported list if you want to check an unusual chip.

My PC says it has no TPM. Is it definitely incompatible?

Not necessarily, and this is the most common false alarm. Most business machines from the 8th generation onward have TPM 2.0 hardware that is simply disabled in the BIOS. Look for a setting named TPM, Security Device, PTT on Intel systems or fTPM on AMD, and enable Secure Boot at the same time. That is frequently the whole fix.

Can I install Windows 11 on an unsupported PC?

Technically yes, using registry changes or modified installation media, but Microsoft advises against it and does not guarantee updates for those machines, including security updates. Since staying secure was the reason for upgrading, that trade-off defeats the purpose on a main computer. It is a reasonable thing to try on a secondary machine.

What are my options if my computer cannot be upgraded?

Five: enrol in Microsoft's Extended Security Updates programme for more time [4]; move to Linux; install ChromeOS Flex; keep the machine offline for a single task; or replace it. Replacement need not mean buying new, since ex-lease business laptops from the 8th generation onward clear the requirement and cost substantially less.

Does more RAM or a new SSD make my PC Windows 11 compatible?

Only if memory or storage was the failing requirement, which is rare. If the processor is unsupported, no amount of RAM or storage changes that, because the processor is on a fixed list and is not upgradeable in a laptop. Check the processor first, before spending anything.

About the author

Jeff Fujii is Director of Reboot IT, which he has run since 2001, before refurbished IT was a recognised commercial category in Australia. Reboot IT refurbishes business laptops, desktops, monitors, phones and networking equipment from its facility in Springvale, Victoria.

Last updated: 2 August 2026.

Disclosure: Reboot IT sells refurbished IT and benefits commercially when readers choose refurbished hardware over new. We've cited primary sources where possible so you can verify our claims independently. Where our internal data is referenced, the source is named explicitly.

References

1. Microsoft. End of support for Windows 10, Windows 8.1, and Windows 7. microsoft.com
2. Microsoft. Windows 11 Specs and System Requirements and the supported-processor lists. microsoft.com
3. Microsoft Learn. Windows 11 supported Intel processors. learn.microsoft.com
4. Microsoft. Windows 10 Extended Security Updates. microsoft.com