Windows 11 system requirements explained so you can check your PC fast
Windows 11 can run on a PC only if it meets Microsoft’s core requirements: a supported 64-bit CPU, 4 GB of RAM, 64 GB of storage, TPM 2.0, and Secure Boot. In practice, the CPU support list matters as much as the raw specs, because many older PCs have enough memory and storage but still fail on processor generation or firmware checks. If your PC misses one of those core items, the upgrade can be blocked or unsupported. Before you try to upgrade, check Microsoft’s current Windows 11 requirements page and your PC maker’s support documentation, because Microsoft can update guidance.
The short answer: what Windows 11 needs
Windows 11’s core requirements are straightforward:
- A compatible 64-bit CPU
- 4 GB RAM
- 64 GB storage
- UEFI firmware with Secure Boot
- TPM 2.0
- DirectX 12-compatible graphics
- A display larger than 9 inches with 720p or better
That list tells you whether a PC is eligible at all, not whether it will feel fast. A machine can clear the minimums and still feel cramped if the storage is nearly full or the processor is very modest.
For example, a laptop with 8 GB of RAM and plenty of storage can still be blocked if its processor is not on Microsoft’s supported list. A desktop can also fail if TPM 2.0 or Secure Boot is missing, disabled, or not configured the way Windows 11 expects.
What usually blocks an upgrade
The most common blocker is an unsupported CPU. Microsoft’s supported processor list is not just a formality; CPU generation and model matter, not just whether the chip is fast enough for everyday use.
The next two blockers are usually TPM 2.0 and Secure Boot. Older PCs often have firmware features that can support them, but the settings are turned off, or the machine is still using legacy boot instead of UEFI with Secure Boot. In that case, the hardware may look fine on paper and still fail the Windows 11 check.
If the PC is older, the CPU list is the first thing to verify. If the processor is not supported, the device may be too old for a supported upgrade even when the other specs look fine.
How to check your PC against the requirements
Start with the PC itself, then compare what you find with Microsoft’s current requirements page and your device maker’s support documentation.
- In Windows, open Settings and look at System > About for the processor, RAM, and device type.
- Use Windows Security or the firmware settings screen to check whether TPM is present and enabled.
- Open System Information to confirm whether the machine uses UEFI and whether Secure Boot is on.
- Check your PC maker’s support pages for the exact BIOS/UEFI option names, because they vary by model.
If you are checking a laptop or prebuilt desktop, the manufacturer’s documentation is often the quickest way to map the requirement to the right setting name.
For the CPU, the model number matters more than the headline speed. Two chips can look similar in everyday use and still land on opposite sides of Microsoft’s supported list, so don’t rely on a rough guess.
When the numbers meet the rules but the PC still feels slow
The minimum requirements are only the entry point. A PC can satisfy them and still feel tight day to day if storage is nearly full, the processor is modest, or RAM is barely above 4 GB.
That is why a machine that technically qualifies may still feel better with more memory and a faster SSD, especially if you keep many apps or browser tabs open. The official minimums tell you what Windows 11 will accept, not what will feel comfortable.
What to verify before you upgrade
Before you upgrade, check the current Microsoft Windows 11 requirements page and your PC maker’s BIOS/UEFI documentation. That matters because Microsoft can update its guidance, and firmware menus are not named the same way on every device.
If one requirement is missing, work through it in this order:
- Check whether the setting is already present but turned off in BIOS/UEFI.
- Look for a firmware update or driver update from the PC maker if the support page mentions one.
- If the processor is not on Microsoft’s supported list, treat the device as too old for a supported upgrade.
If the setting is there but the PC still fails the check, the exact message varies by device and setup. At that point, the model-specific support page is the safest place to confirm whether there is a documented fix.
Frequently Asked Questions
Can I install Windows 11 if my PC has TPM but Secure Boot is off?
Sometimes the install check will still fail until Secure Boot is enabled in UEFI. If your firmware supports it, turn it on before trying again. If the setting is missing, check the PC maker’s documentation for the exact firmware mode your model uses.
Does having 4 GB of RAM mean Windows 11 will run well?
No. 4 GB is the minimum, not a comfort target. It may boot and run, but day-to-day use can feel tight, especially with a browser, chat app, and other tools open at the same time.