How to Fix “This PC Can’t Run Windows 11” Error (Complete Guide)

 Introduction

Have you tried upgrading your computer to Windows 11 only to see the frustrating message:

“This PC Can’t Run Windows 11”

You're not alone. Thousands of users encounter this error when using Microsoft's PC Health Check tool or attempting to install Windows 11. The good news is that in many cases, the problem can be fixed without buying a new computer.

This guide explains exactly why the error appears and provides easy-to-follow solutions that beginners can use. Whether you're a student, office worker, or home user, you'll learn how to identify the cause and get your PC ready for Windows 11.

What Does “This PC Can’t Run Windows 11” Mean?

This message appears when your computer does not meet one or more of Microsoft's Windows 11 system requirements.

Windows 11 introduced stricter security requirements compared to Windows 10. Features such as TPM 2.0 and Secure Boot are mandatory for most installations.

Common causes include:

• TPM 2.0 disabled

• Secure Boot disabled

• Unsupported processor

• Insufficient RAM

• Insufficient storage

• Legacy BIOS mode

• Outdated BIOS firmware

Before fixing the issue, let's understand the requirements.

Windows 11 Minimum System Requirements

Your PC should meet the following requirements:

Requirement	Minimum
Processor	1 GHz or faster, 2+ cores
RAM	4 GB
Storage	64 GB
Firmware	UEFI
TPM	TPM 2.0
Secure Boot	Enabled
Graphics	DirectX 12 compatible
Display	720p or higher

If one or more requirements are missing, Windows 11 installation may fail.

Step 1: Check Why Windows 11 Is Not Supported

The first step is identifying the exact cause.

Use PC Health Check

1. Download Microsoft's PC Health Check tool.

2. Install and open it.

3. Click Check Now.

4. Review the results.

The tool usually shows which requirement is preventing installation.

Screenshot Suggestion

Screenshot 1: PC Health Check showing “This PC Can’t Run Windows 11”.

Step 2: Check TPM 2.0 Status

TPM (Trusted Platform Module) is one of the most common reasons for the error.

How to Check TPM

1. Press Windows + R

2. Type:

tpm.msc

3. Press Enter.

Look for:

Specification Version: 2.0

If TPM 2.0 Is Present

Good news. Move to the next step.

If TPM Is Disabled

You'll need to enable it in BIOS.

Step 3: Enable TPM 2.0 in BIOS

Many computers have TPM built in but disabled by default.

For Intel PCs

TPM may appear as:

• Intel Platform Trust Technology (PTT)

For AMD PCs

TPM may appear as:

• AMD fTPM

Steps

1. Restart your computer.

2. Enter BIOS (usually by pressing F2, F10, Del, or Esc).

3. Locate Security settings.

4. Find:

   • Intel PTT

   • AMD fTPM

5. Enable it.

6. Save changes.

7. Restart Windows.

Screenshot Suggestion

Screenshot 2: BIOS menu showing TPM enabled.

Step 4: Enable Secure Boot

Another major cause of the error is disabled Secure Boot.

What Is Secure Boot?

Secure Boot protects your PC from malicious software during startup.

Windows 11 requires Secure Boot support.

Check Secure Boot Status

1. Press Windows + R

2. Type:

msinfo32

3. Press Enter.

Look for:

• Secure Boot State

If it says:

Off

You must enable it.

How to Enable Secure Boot

1. Restart your PC.

2. Enter BIOS.

3. Open Boot settings.

4. Find Secure Boot.

5. Set it to Enabled.

6. Save and restart.

Screenshot Suggestion

Screenshot 3: Secure Boot setting enabled in BIOS.

Step 5: Convert Legacy BIOS to UEFI

Many older computers still use Legacy BIOS mode.

Windows 11 requires UEFI.

Check BIOS Mode

1. Press Windows + R

2. Type:

msinfo32

3. Press Enter.

Look for:

BIOS Mode

Possible results:

• Legacy

• UEFI

If you see Legacy, continue below.

Convert MBR to GPT

Before switching to UEFI, convert your disk.

Open Command Prompt as Administrator

Run:

mbr2gpt /validate

If validation succeeds:

mbr2gpt /convert

Restart and enter BIOS.

Change:

• Legacy → UEFI

Save settings.

Screenshot Suggestion

Screenshot 4: System Information showing UEFI mode.

Step 6: Verify CPU Compatibility

Some older processors are not officially supported.

Check Your Processor

Press:

Windows + R

Type:

msinfo32

Check:

Processor

Compare it with Microsoft's supported processor list.

Common Supported CPUs

Intel

• 8th Generation and newer

• Core i3, i5, i7, i9

AMD

• Ryzen 2000 series and newer

If your CPU is unsupported, you may need hardware upgrades.

Step 7: Check RAM Requirements

Windows 11 requires at least:

4 GB RAM

Check RAM

1. Right-click Start

2. Select Settings

3. System

4. About

Look for Installed RAM.

Recommended

• 8 GB for students

• 16 GB for multitasking

If RAM is below 4 GB, upgrading is recommended.

Screenshot Suggestion

Screenshot 5: Installed RAM information.

Step 8: Check Available Storage

Windows 11 requires at least:

64 GB storage

Check Storage

1. Open File Explorer

2. Click This PC

Check available space.

Free Up Storage

Delete:

• Temporary files

• Downloads

• Unused applications

• Recycle Bin contents

Step 9: Update BIOS Firmware

An outdated BIOS may prevent Windows 11 compatibility.

Check BIOS Version

1. Press Windows + R

2. Type:

msinfo32

3. Check BIOS Version.

Visit your computer manufacturer's website and compare versions.

Popular Manufacturers

• Dell

• HP

• Lenovo

• ASUS

• Acer

Warning

Never interrupt a BIOS update.

A failed BIOS update can make the computer unusable.

Step 10: Enable Virtualization Features

Some systems require additional security settings.

In BIOS

Enable:

• Intel VT-x

• AMD-V

• Virtualization Technology

Save and restart.

Step 11: Run Windows Update

Installing pending updates can solve compatibility issues.

Steps

1. Open Settings

2. Windows Update

3. Check for Updates

4. Install all updates

5. Restart

Step 12: Repair Corrupted System Files

Corrupted files may trigger compatibility errors.

Run System File Checker

Open Command Prompt as Administrator.

Type:

sfc /scannow

Wait for completion.

Run DISM

After SFC finishes:

DISM /Online /Cleanup-Image /RestoreHealth

Restart the computer.

Step 13: Re-Run the PC Health Check Tool

After applying the fixes:

1. Open PC Health Check.

2. Click Check Now.

3. Verify all requirements pass.

If everything is green, Windows 11 installation should proceed normally.

Screenshot Suggestion

Screenshot 6: PC Health Check showing eligibility.

Advanced Option: Install Windows 11 on Unsupported Hardware

Some users install Windows 11 on unsupported devices.

However:

• Microsoft does not officially recommend it.

• Future updates may be limited.

• Performance may be affected.

For most users, meeting the official requirements is the safer option.

Common Mistakes to Avoid

Ignoring BIOS Settings

Many users assume TPM is missing when it is simply disabled.

Updating BIOS Without Reading Instructions

Always follow manufacturer guidance.

Disabling Security Features

Never disable Secure Boot permanently.

Installing from Untrusted Sources

Use official Windows installation media only.

Frequently Asked Questions (FAQs)

Why does my PC say it can't run Windows 11 even though it is powerful?

The issue is often TPM 2.0 or Secure Boot being disabled rather than insufficient hardware.

Can I install Windows 11 without TPM 2.0?

There are unofficial methods, but Microsoft requires TPM 2.0 for supported installations.

Is 4 GB RAM enough for Windows 11?

Yes, it meets the minimum requirement. However, 8 GB or more is recommended.

How do I know if Secure Boot is enabled?

Open System Information (msinfo32) and check Secure Boot State.

Will enabling TPM delete my files?

No. Enabling TPM usually does not affect personal data.

Do all computers support Windows 11?

No. Some older systems do not meet Microsoft's hardware requirements.

Can updating BIOS fix Windows 11 compatibility issues?

Yes. Many manufacturers released BIOS updates that add TPM or Secure Boot support.

Final Thoughts

The “This PC Can’t Run Windows 11” error can look intimidating, but in many cases the solution is straightforward. Most users discover that TPM 2.0, Secure Boot, UEFI mode, or an outdated BIOS is preventing the upgrade.