Meeting the Windows 11 installation requirements is the single biggest hurdle standing between you and Microsoft’s latest operating system. The good news: once you know exactly what each spec means and why it matters, checking your own PC takes less than five minutes. This guide walks through every requirement in plain English, explains the reasoning behind each one, and tells you precisely how to verify your hardware before you click upgrade.
Why Windows 11 Installation Requirements are Stricter Than Windows 10
Microsoft drew a firm line in the sand when it launched Windows 11 on 5 October 2021. Unlike previous upgrades, Windows 11 enforces hardware-level security features — most notably TPM 2.0 and Secure Boot — that simply did not exist as mainstream requirements before. The result is a more secure OS, but also a longer list of things your PC must support. Understanding the “why” behind each rule makes it far easier to troubleshoot a failed compatibility check.
The Full Windows 11 System Requirements at a Glance
According to the official Microsoft Learn documentation on Windows 11 requirements, every device must meet these minimum thresholds before installation will proceed:
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Processor (CPU): 1 GHz or faster, at least 2 cores, on a compatible 64-bit processor or SoC
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RAM: 4 GB minimum
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Storage: 64 GB or more available disk space
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System Firmware: UEFI, Secure Boot capable
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TPM: Trusted Platform Module (TPM) version 2.0
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Graphics Card: DirectX 12 compatible / WDDM 2.0 driver
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Display: High definition (720p) display, 9″ or greater, 8 bits per colour channel
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Internet Connection: Required for Windows 11 Home setup and for some features
Each of these deserves a closer look — because knowing the number alone won’t tell you whether your specific machine passes the test.
CPU: The Most Common Windows 11 Upgrade Requirements Blocker
The processor requirement trips up more users than any other spec. It isn’t just about clock speed — Microsoft maintains a strict list of supported CPU generations. For Intel, that generally means 8th Generation Core processors or newer; for AMD, it starts with Ryzen 2000 series or newer; and for Qualcomm, it applies to Snapdragon 850 and above.
Why the generation cutoff? Older chips lack the instruction sets and security mitigations (such as Spectre/Meltdown hardware fixes) that Windows 11’s architecture relies on. A 7th-generation Intel Core i7 might be fast enough in raw GHz, but it won’t pass the compatibility check because it’s off Microsoft’s supported list.
How to Check Your CPU
Press Win + R, type msinfo32, and press Enter. Under “System Summary” you’ll see your Processor name and generation. Alternatively, right-click the Start button and select System — your processor model appears under Device Specifications.
RAM: 4 GB Is the Floor, Not the Target
The official Windows 11 PC requirements set 4 GB as the minimum RAM. However, in practice Windows 11 itself consumes 2–3 GB at idle, leaving very little headroom for applications. For a comfortable everyday experience — especially with a browser, Office apps, and background processes running — 8 GB is the realistic entry point, and 16 GB is recommended for anyone doing creative or multitasking work.
How to Check Your RAM
Open Task Manager with Ctrl + Shift + Esc, click the Performance tab, and select Memory. You’ll see total installed RAM and how much is currently in use. For the full spec breakdown including type and speed, the msinfo32 tool also lists total physical memory.
Storage: 64 GB Is a Bare Minimum
Windows 11 requires 64 GB of free storage space for installation. This is a floor, not a comfortable working figure. After installation, Windows itself, system restore points, and the page file will consume a significant portion of that. For a practical daily-driver machine, an SSD of 256 GB or more gives you breathing room for apps, updates, and personal files.
It’s also worth noting that the 64 GB requirement refers to available space, not total drive size — so if you have a 128 GB drive that’s 70 GB full, you’ll need to clear space before upgrading.
How to Check Your Storage
Open File Explorer, right-click your C: drive, and select Properties. The dialogue box shows total capacity and free space at a glance.
TPM 2.0: The Most Misunderstood Windows 11 Installation Requirement
TPM 2.0 — Trusted Platform Module version 2.0 — is a dedicated security chip (or firmware equivalent) that stores cryptographic keys and supports features like BitLocker encryption, Windows Hello biometric sign-in, and Secure Boot attestation. It is the requirement that generates the most confusion, and for good reason: many PCs manufactured after 2016 have TPM 2.0 hardware present but disabled in the BIOS/UEFI by default.
In other words, your machine might already pass this Windows 11 upgrade requirement — it just needs to be switched on.
How to Check and Enable TPM 2.0
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Press Win + R, type
tpm.msc, and press Enter. -
The TPM Management console opens. If it shows “TPM is ready for use” with version 2.0, you’re set.
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If TPM is “not found” or shows version 1.2, reboot into your BIOS/UEFI (usually by pressing Del or F2 at startup) and look for TPM, PTT (Intel Platform Trust Technology), or fTPM (AMD Firmware TPM) settings and enable them.
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After saving and rebooting, re-run
tpm.mscto confirm version 2.0 is active.
Secure Boot and UEFI Firmware
Secure Boot prevents malicious software from loading during the PC’s startup sequence — it only allows operating system bootloaders that are digitally signed and trusted. Windows 11 requires your firmware to be UEFI (not legacy BIOS) and for Secure Boot capability to be present, though it doesn’t always need to be currently active to pass the PC Health Check tool.
How to Check Secure Boot Status
Press Win + R, type msinfo32, press Enter. Look for “Secure Boot State” — it should read On. If it reads Unsupported, your board may be running in Legacy BIOS mode rather than UEFI mode, and you’ll need to convert the disk from MBR to GPT as well as switch firmware modes before upgrading.
Graphics Card: DirectX 12 and What It Really Means
Windows 11 requires a GPU that supports DirectX 12 and uses a WDDM 2.0 or later driver. In practice, virtually every discrete GPU released since 2014 and every integrated graphics solution in Intel 7th-generation or newer processors already meets this bar. This requirement is rarely the reason a PC fails compatibility — but it’s worth a quick check if you have an older dedicated card.
How to Check DirectX Version
Press Win + R, type dxdiag, press Enter. The DirectX Diagnostic Tool shows your DirectX version on the System tab and your display adapter details on the Display tab.
Use the PC Health Check App to Verify All Windows 11 PC Requirements at Once
Rather than checking each spec manually, Microsoft’s free PC Health Check app runs every Windows 11 installation requirement test in one go. Download it from Microsoft’s website, run the check, and it will tell you clearly whether your device is eligible and — critically — which specific requirement is failing if it isn’t.
The app checks CPU generation compatibility, TPM version, Secure Boot, RAM, storage, and display resolution simultaneously, and gives you a pass/fail result with actionable guidance on any failures.
What Happens If Your PC Fails the Windows 11 System Requirements?
If your machine doesn’t pass, you have a few paths forward:
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Enable TPM / Secure Boot in BIOS: If the only failing items are TPM or Secure Boot, a BIOS change may be all that’s needed — no hardware purchase required.
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Upgrade RAM or storage: These are affordable hardware upgrades for desktop and many laptop owners.
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Replace the CPU or the whole PC: If the processor generation is the blocker, this is the more involved fix — but it’s also the most common scenario for machines over five years old.
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Stay on Windows 10 temporarily: Microsoft extended free security updates for Windows 10 into 2026 for qualifying devices, buying some time for a planned upgrade.
If you’re ready to move to a new licence, Top Key Shop carries genuine Windows 11 licence keys — Home, Pro, and bundles at competitive prices, with instant email delivery and free activation support. If you’re upgrading a compatible machine and want the full package, the Windows 11 Pro + Office 2024 Professional Plus bundle is available from €19.10 — a practical way to get both essentials in one go.
Frequently Asked Questions
Can I install Windows 11 on an unsupported CPU?
Technically, unofficial workarounds exist, but Microsoft does not support them. Devices installed on unsupported hardware may not receive future updates and could lose access to security patches — significantly increasing risk. For daily-use machines, staying on a supported configuration is the safer and more practical choice.
Does my PC need to have TPM 2.0 hardware, or can it be software-based?
Both physical TPM chips and firmware-based equivalents (Intel PTT, AMD fTPM) satisfy the Windows 11 installation requirements. Most modern motherboards use firmware TPM, which is enabled in the BIOS rather than a separate physical chip — so you likely already have what you need without buying anything.
Is 4 GB of RAM really enough to run Windows 11 well?
It meets the minimum Windows 11 PC requirements, but performance at 4 GB will feel constrained as soon as you open a few browser tabs or applications simultaneously. Microsoft’s own documentation suggests 4 GB as the absolute floor. For a smooth, responsive experience, 8 GB or more is strongly recommended.
How do I know if my PC uses UEFI or legacy BIOS?
Open msinfo32 (Win + R, type msinfo32, press Enter) and look for the “BIOS Mode” entry. If it says UEFI, you’re good. If it says Legacy, you’ll need to convert your disk from MBR to GPT format and switch the firmware to UEFI mode before Windows 11 will install — a process best done before initiating the upgrade.
Will meeting the minimum Windows 11 upgrade requirements guarantee good performance?
Meeting the minimums guarantees that Windows 11 will install and run — it doesn’t guarantee a snappy experience. Think of the minimum specs as the “will it start?” threshold. For everyday productivity, video calls, and light creative work, aim for a quad-core processor, 8 GB RAM, and a 256 GB SSD as your practical baseline.
