How to free up space on your PC after upgrading to Windows 11

How to free up space on your PC after upgrading to Windows 11

Windows 11 has been available for a few months now, and it’s a free upgrade that we definitely recommend in our Windows 11 review. But if you recently upgraded to Windows 11 from Windows 10, or if you install a big update for Windows 11 in the future, you might notice that there’s quite a bit of disk space being taken up on your PC all of a sudden, and you may want to free it up.

The reason for this is that Windows keeps a copy of the system files from your old Windows installation. That way, if you run into any problems after the upgrade, you can roll back to the previous version and get things back to normal. But if you haven’t had any issues and you need the free space, you can delete the old files after upgrading to Windows 11.


Deleting these old files will make it impossible to roll back to the previous version of Windows, so only do this if you’re confident things are working well. There are two ways you can do this, and the final result is the same, so it’s ultimately up to you how you want to do it. One method involves using the Settings app, and the other is using the Disk Cleanup feature that’s part of the classic Control Panel.

Free up space using the Windows 11 Settings app

If you want to use the more modern Windows 11 Settings app, here’s what you need to do:

  • Open the Settings app (you can find it in the Start menu)
  • On the page that opens by default (it should be the System section), click Storage.
  • Click the Temporary files option
    Windows 11 storage settings with Temporary files option highlighted
  • Look for an option called Previous Windows installation(s) and check the box next to it. It should be at least 10GB in size.
    List of temporary files with Previous Windows installation selected
    You may want to keep the other boxes unchecked if you think those files are important. Specifically, make sure the Downloads option isn’t enabled, as it will delete most of your downloaded files.
  • Click the Remove files button at the top of the list. The process will take a few minutes.

Free up space using Disk Cleanup

If you’re more of a fan of the old-school Windows tools, you can also use the Disk Cleanup feature to free up space after upgrading to Windows 11. Here’s the easiest way to do it:

  • Open the Start menu and use the search bar to search for Disk Cleanup and select it.
    Search results for Disk cleanup on Windows 11
  • You may see a prompt asking you which drive you want to scan (if you have more than one). Choose the drive where your Windows installation is (it should be the default).
  • Once it finishes scanning, you’ll see a list of the types of files that can be deleted, but the files you want aren’t there yet. Click Clean up system files (this step requires administrator privileges).
  • Look for Previous Windows installation(s) and check the box next to it.

    Make sure you haven’t checked any other boxes that may include important files.
  • Click OK to delete the files.

And that’s all you need to know to free up space on your PC after upgrading to Windows 11. This only really applies to upgrades using Windows Update, so if you followed our guide to install Windows 11 using an ISO, you’ll have as much free space as you can get. If you’re interested in other helpful Windows 11 tips, maybe check out how to generate a battery report so you know how your laptop’s battery is doing.

About author

João Carrasqueira
João Carrasqueira

Editor at XDA Computing. I've been covering the world of technology since 2018, but I've loved the field for a lot longer. And I have a weird affinity for Nintendo videogames, which I'm always happy to talk about.

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