A clean install of Windows 11 is the best way to fix system errors, remove malware, boost performance, or install Windows on a new SSD. Unlike an upgrade, a clean install removes old system files and gives you a fresh start. In this guide, you’ll learn how to do a clean install of Windows 11 from USB, without USB, without losing files, and even on unsupported hardware.
What Is a Clean Install of Windows 11?
A clean install deletes the existing Windows installation and installs a fresh copy of Windows 11. This method removes corrupted files, drivers, and unwanted apps that slow down your PC.
Before starting, ensure your system meets Windows 11 requirements, including TPM 2.0. You can follow this guide to enable it in BIOS:
👉 https://multicaretechnical.com/how-to-enable-tpm-2-0-in-bios-gigabyte-asus-msi-dell-hp-aorus-more
Things to Do Before Clean Installing Windows 11
- Backup important files to an external drive or cloud
- Ensure stable internet connection
- Keep Windows 11 product key ready
- Plug in charger (for laptops)
- Create a bootable USB (if needed)
How to Do a Clean Install of Windows 11 From USB (Recommended)
This is the most reliable method.
Steps:
- Download Windows 11 Media Creation Tool from Microsoft
- Insert an 8GB or larger USB drive
- Run the tool and select Create installation media
- Choose USB flash drive
- Restart PC and boot from USB (F12 / Esc / F9 key)
- Select Install Now
- Choose Custom: Install Windows only
- Delete old partitions (optional)
- Select drive and install Windows 11
✔ Best method for new SSDs and corrupted systems
How to Do a Clean Install of Windows 11 Without USB
If your system already runs Windows 10 or 11:
Steps:
- Go to Settings → System → Recovery
- Click Reset this PC
- Choose Remove everything
- Select Cloud download
- Follow on-screen instructions
This method is useful if you don’t have a USB drive.
How to Do a Clean Install of Windows 11 Without Losing Files
You can keep personal files while reinstalling Windows:
Steps:
- Open Settings → System → Recovery
- Click Reset this PC
- Choose Keep my files
- Select Local reinstall or Cloud download
⚠ Apps and drivers will be removed, but files remain safe.
How to Do a Clean Install of Windows 11 From Windows 10
Upgrading from Windows 10 cleanly improves performance.
Steps:
- Download Windows 11 ISO
- Double-click ISO and run setup.exe
- Select Nothing when asked what to keep
- Proceed with installation
This is ideal if your PC already supports Windows 11.
How to Do a Clean Install of Windows 11 Pro
During installation:
- Choose Windows 11 Pro when asked for edition
- Or enter a Windows 11 Pro product key
- If skipped, you can upgrade later from Settings → Activation
How to Do a Clean Install of Windows 11 on a New SSD
Perfect for PC upgrades.
Steps:
- Install SSD physically
- Boot from Windows 11 USB
- Select new SSD during installation
- Delete all existing partitions
- Install Windows 11
✔ Best performance and fastest boot times
How to Do a Clean Install of Windows 11 on Unsupported Hardware
⚠ Not officially recommended, but possible.
Methods:
- Bypass TPM & Secure Boot using Registry
- Use Rufus to create modified USB
- Install using Windows 11 ISO
After installation, you may need to manually manage updates.
Useful Windows 11 Guides (Internal Links)
- Turn off FPS counter in Windows 11:
👉 https://multicaretechnical.com/how-to-turn-off-fps-counter-in-windows-11-easy-methods - Turn off Airplane Mode in Windows 10/11:
👉 https://multicaretechnical.com/how-to-turn-off-airplane-mode-in-windows-10-11-complete-guide
Common Problems After Clean Install & Fixes
- No internet → Install network drivers
- Activation issues → Sign in with Microsoft account
- Missing drivers → Use Windows Update
- Performance issues → Disable unnecessary startup apps
FAQs – Clean Install of Windows 11
Can I clean install Windows 11 without USB?
Yes, use the Reset this PC option with cloud download.
Will I lose data after clean installing Windows 11?
Yes, unless you choose Keep my files during reset.
Is clean install better than upgrade?
Yes, it removes junk files and improves performance.
Can I install Windows 11 on unsupported hardware?
Yes, but updates may be limited and risks are involved.
Do I need a product key?
If Windows was previously activated, it will auto-activate again.