Delete Windows.old folder in Windows 10 using Command Prompt
Step 1:
Open elevated Command Prompt. To do so, type CMD in taskbar search box or Start search box and then simultaneously press Ctrl+Shift+Enter keys to open Command Prompt as administrator. Click Yes button when you see the UAC dialog.Step 2:
In the Command Prompt, paste the following command and then press Enter key to delete Windows.old folder.RD /S /Q %SystemDrive%\windows.old
If you’re getting any error, make sure that you launched the Command Prompt as administrator. Good luck!
This method has been the best way to remove Windows.old folder when I was unable to remove it with Disc Cleaner. To see more ways visit the site below.
http://www.intowindows.com/how-to-delete-windows-old-folder-in-windows-10/