How to Delete the Windows.old Folder in Windows 10 and Windows 11

Your C: drive is suddenly short on space after a Windows upgrade, and a Windows.old folder is taking up 10 GB or more of storage. On Windows 11, the quickest fix is Method #1 below. Deleting the folder is safe once you’re settled on the new version, but it permanently removes the files needed to roll back, so confirm you’re done with the old installation before continuing.

Method #1: Delete with Cleanup recommendations (Windows 11)

This is the cleanest path on Windows 11. Windows labels the entry Previous Windows installation(s) rather than “Windows.old,” which is why a lot of people scroll right past it.

1. Press Windows + I to open Settings.
2. Go to System > Storage.
3. Select Cleanup recommendations.

4. Check Previous Windows installation(s).
5. Select Clean up.

Windows removes the folder and frees the space it was using, often several gigabytes, which is enough to make a real dent if you’re running low and haven’t yet moved files to a portable SSD.

Method #2: Delete via Temporary files in Settings (Windows 10 and 11)

If Cleanup recommendations doesn’t show a previous installation entry, the Temporary files page catches it on both Windows 10 and Windows 11.

1. Press Windows + I to open Settings.
2. Go to System > Storage.
3. Select Temporary files.

4. Check Previous version of Windows. It may also appear as Previous Windows installation(s) depending on your build.
5. Click Remove files.

Both labels point to the same Windows.old folder. The exact wording varies by Windows version, so don’t worry if yours reads slightly differently.

Method #3: Delete with Disk Cleanup (both versions, fallback)

Disk Cleanup is the older route, but it works reliably on both Windows 10 and Windows 11. It’s a solid fallback if the Settings paths above don’t show a previous installation entry for some reason.

1. Type disk cleanup in the Start menu search and open Disk Cleanup.
2. Select your C: drive and click OK.
3. Click Clean up system files at the bottom of the dialog.

4. Select the C: drive again when prompted and click OK.
5. Wait for the second scan to finish. It takes longer than the first, and that’s normal.
6. Scroll down and check Previous Windows installation(s).

7. Click OK, then confirm by clicking Delete Files.

While you’re here, Windows Update Cleanup is worth checking too. Old update files can take up several more gigabytes, and it’s one extra checkbox.

When Windows.old doesn’t appear in any of these tools

If none of these methods list a previous installation, Windows.old either wasn’t created (clean installs skip it) or it’s already been removed automatically. Windows deletes the folder on its own after a period of time, so if your upgrade was months ago, it may already be gone.

Which method to use

On Windows 11, start with Cleanup recommendations. On Windows 10, or if that option doesn’t list a previous installation, use Temporary files or Disk Cleanup. Once Windows.old is gone you can no longer roll back to the previous version, so only delete it after you’ve used the new version long enough to be sure it works for you. If storage is still tight after cleanup, moving large files to an external hard drive or picking up a USB flash drive for backups are the natural next moves.