Microsoft’s latest operating system Windows 10 is a big hit with many users all over the world. If you upgrade your PC to Windows 10 and think that your old operating system get erased, you are wrong. It doesn’t disappear but lingers in a system folder called windows.old.

The Windows.old folder retains all the data and files from your old Windows system. Therefore, if you don’t like the new version, you can use it to roll back to your old version.

On the contrary, if you upgrade from Windows 7 or 8.1 to Windows 10 and you are happy running the new operating system, you can remove the Windows.old folder completely to save a huge amount of space on your hard drive. However, you can’t deleting it like you delete any normal folder. Therefore, if you simply delete the Windows.old directory in File Explorer, you’ll receive an error message. You can’t remove most of the files since the system considers them system files.


remove windows.old folder in windows 10
The Windows.old folder can occupy a huge amount of space on your hard drive, so you can delete it completely after you upgrade your PC to Windows 10.

Following are easy steps that you can follow to delete the Windows.old folder in Windows 10.
Step 1: Type Cleanup into the Windows search box and then launch the Disk cleanup application
Step 2: Click the “Clean up system files” button
Step 3: Wait for Windows to scan for files. When you see “Previous Windows installation(s)” in the list, check the box next to the entry.
Step 4: Click OK to start the cleanup. It will take you from 30 seconds to several minutes to delete the files.

You can try this way to delete the Windows.old folder and save a lot of space in case you are seriously strapped for space on your hard drive. If not, you have to do nothing because Windows 10 will remove it automatically one month after you perform your upgrade, anyway.