How to Upgrade to Windows 11 (Step-by-Step) – 2026 Complete Guide

Want to upgrade your PC to Windows 11 safely without losing files?
In this guide, you’ll learn the easiest and safest ways to upgrade from Windows 10 to Windows 11, including
system requirements (TPM 2.0), backup tips, and solutions for common Windows 11 upgrade problems.

Before You Upgrade: Important Checklist

• Backup your files (Documents, Desktop, Pictures)
• Make sure your laptop/PC is plugged in (no battery failure)
• Have at least 25–30 GB free space
• Update Windows 10 first (recommended)
• Disconnect extra USB devices (printer/USB drive) during upgrade

Windows 11 System Requirements (Quick Check)

To upgrade officially, your PC must support:

• TPM 2.0
• Secure Boot
• Supported CPU
• At least 4GB RAM (8GB recommended)

How to check TPM 2.0

1. Press Windows + R
2. Type: tpm.msc and press Enter
3. Check “TPM Manufacturer Version” (should show 2.0)

Method 1 (Best): Upgrade to Windows 11 using Windows Update

This is the easiest method and safest for most users.

1. Click Start → Settings
2. Go to Windows Update
3. Click Check for updates
4. If available, you’ll see: Upgrade to Windows 11
5. Click Download and install

Method 2: Upgrade using Windows 11 Installation Assistant

If Windows Update doesn’t show the upgrade option, Installation Assistant helps.

1. Download the official Windows 11 Installation Assistant from Microsoft
2. Run the tool and accept license
3. Let it download and install Windows 11
4. Restart when prompted

Method 3: Upgrade using USB (Media Creation Tool method)

This method is best if you want a clean installation or multiple PCs.

1. Create a bootable Windows 11 USB using Microsoft Media Creation Tool
2. Run setup.exe inside the USB
3. Select Keep personal files and apps (recommended)
4. Continue installation

Common Windows 11 Upgrade Problems & Fixes

Fix 1: “This PC can’t run Windows 11”

• Enable TPM 2.0 in BIOS
• Enable Secure Boot
• Update BIOS if required

Fix 2: Upgrade stuck at 0%, 20%, or 99%

• Restart PC and try again
• Disconnect printer/USB devices
• Make sure you have enough disk space

Fix 3: Windows 11 update failed (error code)

• Run: Windows Update Troubleshooter
• Repair system files with CMD (Admin): sfc /scannow
• Try upgrading using Installation Assistant

FAQ (Frequently Asked Questions)

Will upgrading to Windows 11 delete my files?

No, if you select upgrade and choose “Keep personal files and apps”, your files remain safe. But backup is recommended.

Can I upgrade to Windows 11 for free?

Yes, eligible Windows 10 PCs can upgrade to Windows 11 for free.

How long does Windows 11 upgrade take?

Usually 30–90 minutes depending on your internet speed and computer performance.

What if my PC is not compatible?

You may not be able to upgrade officially. In that case, you can keep Windows 10 or consult a technician for supported options.