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Upgrading from Windows 11 25H2 to 26H2: A Simple Guide

Upgrading from Windows 11 25H2 to 26H2 boosts your system's performance and introduces exciting features. Follow our simple guide for a smooth transition.

4 min read
Windows 11 computer setup

Upgrading from Windows 11 25H2 to 26H2 enhances your system's performance and introduces new features. This guide provides clear, step-by-step instructions to help you navigate the upgrade process effectively. By following these steps, you can ensure a smooth transition to the latest version.

Checking Your Current Windows Version

To confirm if you are running Windows 11 25H2, follow these steps:

  1. Click on the Start menu.
  1. Type Settings and press Enter.
  1. In the Settings window, select System.
  1. Click on About at the bottom of the left sidebar.
  1. Look for the Windows specifications section. Here, you'll see your current version listed.

If your version is 25H2, you can proceed with the upgrade.

A person navigating the settings on a Windows 11 device to check the version.

Initiating the Upgrade Process

To upgrade from Windows 11 25H2 to 26H2, follow these steps:

  1. Ensure your device is connected to the internet and is plugged into a power source.
  1. Go back to the Settings window.
  1. Click on Windows Update from the left sidebar.
  1. Click on Check for updates. Windows will search for available updates, including the 26H2 upgrade.
  1. If the upgrade is available, click on Download and install. This may take some time depending on your internet speed.
  1. Once downloaded, click on Restart now to begin the installation process.
  1. Follow any on-screen instructions to complete the upgrade. Your computer will restart several times during this process. When the installation is complete, you will see the Windows 11 26H2 desktop.

Troubleshooting Upgrade Failures

If you encounter issues during the upgrade, consider these common solutions:

  1. Error Codes: Take note of any error codes displayed; the exact message varies. You can look these up on Microsoft's support site for specific guidance.
  1. Free Space: Ensure you have at least 20 GB of free disk space for the upgrade.
  1. Drivers: Make sure your device drivers are up to date, especially for graphics and network devices, as outdated drivers can cause issues.
  1. Antivirus Software: Temporarily disable any third-party antivirus software that might interfere with the upgrade process.
  1. Windows Update Troubleshooter: Use the built-in troubleshooter. Go to Settings > System > Troubleshoot > Other troubleshooters, and select Windows Update.
  1. System Restore: If the upgrade fails, consider using System Restore to revert to a previous state before the upgrade attempt.

Backing Up Your Data

Backing up your data before an upgrade is crucial to prevent data loss. Here's how to do it:

  1. Connect an external hard drive or USB flash drive to your computer.
  1. Open File Explorer and navigate to the files and folders you want to back up.
  1. Copy the selected files and paste them into your external drive.
  1. Alternatively, use Windows Backup: - Go to Settings > Update & Security > Backup. - Click on Add a drive and select your external drive. - Follow the prompts to set up automatic backups.
  1. Consider creating a system image for a more comprehensive backup. Go to Control Panel > System and Security > Backup and Restore (Windows 7) and select Create a system image.
A person backing up files on a Windows 11 device using an external drive.

Post-Upgrade Optimization Tips

After upgrading to Windows 11 26H2, consider these tips to optimize your system:

  1. Check for Updates: Go to Settings > Windows Update and ensure your system is fully updated.
  1. Review Privacy Settings: Navigate to Settings > Privacy & security to adjust any permissions based on your preferences.
  1. Reinstall Software: If any applications are not functioning as expected, consider reinstalling them.
  1. Disk Cleanup: Use the Disk Cleanup tool to remove unnecessary files. Search for Disk Cleanup in the Start menu, select the drive, and choose what to clean.
  1. Performance Settings: Access Settings > System > Display, and adjust graphics performance settings if needed.