How to delete the Windows.old folder in Windows 10

Windows.old – what is it?

Windows.old stores the information about the previous installation on Windows OS. For example if you have upgraded to Windows 10 you can roll back and use your Windows 7 or 8.1. After you delete the Windows.old folder you would be unable to revert to the previous Windows version. 

how to remove windows.old in Windows 10

How to delete windows.old in WIndows 10

Why delete Windows.old?

As far as this folder contains the previous operating system it takes a lot of space on your disk – 30 or 40 GigaBytes or even more depending on how many software you had on your old Windows. . If you are sure you like your current OS and won’t need to revert to the previous version you may want to remove Windows.old to free the storage.

How to remove Windows.old folder in Windows 10

1. Right-click the system driver (in most cases Disk C:) and click Properties:


2. Click on Disk Cleanup:

delete windows.old: disk cleanup

3. Wait while the system is calculating the amount of the used space:

disk cleanup: wait

4. Now click on Clean up system files:

clean up system files

5. Wait again…


6. Set the checkbox Previous Windows installations and click OK:

previous Windows installations

7. Press Delete Files to remove the Windows.old folder from your disk:

delete windows.old

Wait until the procedure is finished.

8. If the Windows/old folder is still on the disk delete it manually:

delete windows old manually

If you cannot delete the folder because it is busy read the next paragraph.

Delete Windows.old folder using the command prompt

Launch the command prompt as administrator:

cmd as admin

Type the following commands:

cd C:\
attrib -r -a -s -h C:\Windows.old /S /D
takeown /f Windows.old /a /r
rd /s /q Windows.old

Clean up the Windows.old folder in Windows 10 using All Settings

Users say that in some cases they fail to delete the contents of the Windows.old folder using the solutions mentioned above. But fortunately there is yet another method to clean up the Windows.old folder in Windows 10:

  1. Press Win+A to open the Action Center.
  2. Click on All Settings.
  3. Head to System > Storage.
  4. Here click on your system disk (usually disk C:).
  5. Scroll down and select Temporary filestemporary files
  6. Set the checkbox Previous Versions of Windows.
  7. Click Remove Files: previous versions of windows remove files

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