Or just in case you want togo back (downgrade) to the previous version.

If you decide that youre happy running Windows 10 current version and dont want to roll back.

Then you’re free to simply delete the windows.old folder to save hard disk space.

Or will get deleted automatically usually by Windows after a set period of time.

Lets See How to Remove Windows.old Folder permanently.

Here Under General Tab select Disk Cleanup.

And Wait flew minute, Disk cleanup Tool To clean disk drive.

This will scan system error, memory dump files, Temp Internet Files Etc.

When the Disk Cleanup utility has loaded, choose the Cleanup system files button under the Description section.

The Disk Cleanup window will appear again.

Thats a Normal warning, Click Yes, and let Disk Cleanup do its job.

Delete Windows.old using Storage Sense

With the latest Windows 10 Microsoft Added A new Feature Storage sense.

you’re free to do this from Windows prefs -> System -> Storage.

Here you will find the Option Named Storage Sense, unlock the feature.

And poke the link Change how we free up space.

Change how we free up space page will appear.

UnderFree up space now, check the optionDelete previous versions of Windows.

And nudge the buttonClean now,This will remove the files from the earlier installed OS instantly.

  • /T /grant administrators:F

This will grant Administrators, Full rights to all Folder and files.

So that you’ve got the option to easily Delete previous installation files with any permission Error.

Now typermdir /S /Q C:Windows.oldTo Delete the windows.old folder.

Also, you could use Third-party Applications likeCCleanerto Cleanup Windows.old Folder.