How to clean install Windows

Complete guide with multiple methods and troubleshooting

7-10 min read
Expert Verified
Last Updated: August 2025

Quick Answer

A clean install of Windows involves erasing the existing operating system and installing a fresh copy. This process can help resolve persistent issues and improve system performance.

Medium⏱ 7-10 min read

Prerequisites & Requirements

Before starting a clean install of Windows, ensure you have the following:
  • •A compatible PC with at least 1 GHz processor, 1 GB RAM for 32-bit or 2 GB for 64-bit, and 16 GB of free disk space.
  • •Administrator access to the PC.
  • •Windows installation media (USB/DVD) created using the Windows Media Creation Tool or a downloaded ISO file.
  • •Backup all important data, as a clean install will erase all files on the system drive.

Method 1: Clean Install Using Windows Installation Media

This method is recommended when you have a Windows installation USB or DVD ready. It is the most straightforward way to perform a clean install.
  • •Step 1: Insert the Windows installation USB or DVD into your PC.
  • •Step 2: Restart your PC and press the appropriate key (usually F2, F12, ESC, or DEL) to enter the Boot Menu.
  • •Step 3: Select the USB or DVD drive from the boot options and press Enter.
  • •Step 4: When the Windows Setup screen appears, select your language, time, and keyboard preferences, then click 'Next'.
  • •Step 5: Click 'Install Now'.
  • •Step 6: Accept the license terms and click 'Next'.
  • •Step 7: Choose 'Custom: Install Windows only (advanced)'.
  • •Step 8: Select the partition where Windows is currently installed (usually Drive 0) and click 'Delete'. Confirm the deletion.
  • •Step 9: Select the unallocated space and click 'Next' to begin the installation.
  • •Step 10: Follow the on-screen prompts to complete the installation.
  • •Step 11: After installation, set up your preferences and create a user account.
  • •Step 12: Verify the installation by checking the system properties (Right-click 'This PC' > 'Properties').

For Windows 11

Windows 11 specific steps include additional hardware requirements and features.
  • •Ensure your PC meets the Windows 11 requirements, including TPM 2.0 and Secure Boot.
  • •During setup, you may be prompted to sign in with a Microsoft account for certain features.

For Windows 10

Windows 10 specific steps are similar but may not require TPM.
  • •You can skip the Microsoft account sign-in during setup if you prefer a local account.

Method 2: Reset This PC

This method is useful if you want to reset your current installation without using external media.
  • •Step 1: Click on the Start menu and select 'Settings'.
  • •Step 2: Go to 'Update & Security'.
  • •Step 3: Click on 'Recovery' in the left pane.
  • •Step 4: Under 'Reset this PC', click 'Get started'.
  • •Step 5: Choose 'Remove everything' for a clean install.
  • •Step 6: Follow the prompts to complete the reset process.
  • •Step 7: After the reset, set up your preferences and create a user account.

Troubleshooting Common Issues

If you encounter issues during the clean install, refer to the following solutions:
  • •Error: 'Windows cannot be installed to this disk' - Solution: Ensure the disk is formatted correctly and is not set as a dynamic disk.
  • •Issue: Installation freezes or fails - Fix: Check the installation media for corruption and ensure your hardware meets the requirements.
  • •Problem: Missing drivers during installation - Workaround: Download necessary drivers from the manufacturer’s website and load them during the installation process.

Advanced Tips & Shortcuts

These tips can help streamline the clean installation process:
  • •Keyboard shortcut: Windows + R - Opens the Run dialog to quickly access system tools.
  • •Command line: DISM /Online /Cleanup-Image /RestoreHealth - Use this command to repair Windows images before installation.
  • •Hidden feature: Windows Recovery Environment - Access this by holding Shift while clicking 'Restart' for advanced recovery options.

Common Mistakes to Avoid

Avoid these common pitfalls:

Expert Tips

For the best results, always ensure your installation media is up-to-date and your hardware meets the latest requirements.