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After upgrading to Windows 11 from Windows 10 or another version, you will probably notice a spike in storage usage. Use these steps to get the storage back.

When you upgrade to Windows 11 from Windows 10 or another version, the setup makes a copy of the previous installation as part of the process, in case something wrong happens during the installation, and the system needs to roll back to the original setup, or Windows 11 is having compatibility issues, and you need to revert to a previous version manually. Although the safeguard feature provides a way to restore the original changes, the copy of the files will be kept even after the upgrade completes successfully, taking a lot of storage (inside the “Windows.old” folder) that can be an issue for devices with limited capacity.

If you notice that your laptop or desktop computer is running out of space after the upgrade, Windows 11 includes an option to delete the previous files that can reclaim 12GB or more, depending on the previous configuration.

In this Windows 11 guide, we will walk you through the steps to delete the previous installation files wasting space after upgrading to the new version of the OS.

• How to free up space after Windows 11 using Settings
• How to free up space after Windows 11 using Disk Cleanup  

How to free up space after Windows 11 using Settings

To reclaim space after installing Windows 11, use these steps:

1. Open Settings.
2. Click on System.
3. Click on Storage.
4. Click the Temporary files page on the right-side.
5. 
6. Clear all the preselected items (if applicable).
7. Check the Previous Windows installation(s) option.
8. 
9. Click the Remove files button.

Once you complete the steps, the previous installation files will be removed alongside any other temporary files you may have selected on the settings page.

In previous versions, the option was also available through the Storage settings, but it’s no longer the case with Windows 11.

How to free up space after Windows 11 using Disk Cleanup

In addition to using the Settings app, you can also use the legacy Disk Cleanup tool to delete the folder with the previous installation of Windows 11.

To free up space after the installation of Windows 11 with Disk Cleanup, use these steps:

1. Open Start.
2. Search for Disk Cleanup, click the top result to open the settings.
3. Click the Clean up system files button.
4. 
5. Check the Previous Windows installation(s) option.

Quick tip: You can also select other temporary files (such as Delivery Optimization Files and Windows update log files) to recover even more space.

1. Clear the Downloads option to avoid deleting downloaded files inside the “Downloads” folder.
2. Click the OK button.

After you complete the steps, the folder with the previous installation files will be deleted from your computer, freeing up storage on the main drive.

The system will only keep the copy of the earlier setup for the first ten days after the upgrade. After this period, Windows 11 will automatically delete these files. Also, after removing the files, the option to roll back will no longer be available in the Settings app. In the future, if you want to downgrade, you will have to do a clean installation using the version of Windows you want to use.

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