How to free up disk space after a major Windows 10 update

Each major Windows 10 update leaves some residual folders and files behind; learn how to clean them up.


Image: Matt Elliott/CNET

If you want to install the latest bi-annual update to
Windows 10
(the spring update or the fall update), check your available hard disk space before, and then after, the update. Following the update, you may notice that your amount of free disk space has shrunk. That’s because Windows stores installation files from the previous version should you want to revert back to it. That’s fine. But at some point you’ll likely want to stick with the updated version. How do you then get rid of those older folders taking up disk space? Let’s check it out.

SEE: 10 tricks and tweaks for customizing Windows 10 (free PDF) (TechRepublic)

After you’ve installed the latest major Windows 10 update, open File Explorer to the root of your C-drive or whichever system drive holds Windows. You should find two folders: Windows.old and Windows10Upgrade. The Windows.old folder stores all the files from your previous Windows installation should you ever need to go back to it. The Windows10Upgrade folder is generated and used by the Windows Update Assistant to perform the actual update (Figure A).

Figure A


Windows10Upgrade is the easier folder to remove, so let’s tackle that one first. Open Settings and go to the Apps category. At the Apps & Features screen, scroll down until you see the entry for Windows 10 Update Assistant. Click on it and then click the Uninstall button (Figure B). At the next screen, confirm that you want to uninstall the Windows 10 Update Assistant by selecting the Uninstall button.

Figure B


Of course, you can also uninstall the program via Control Panel. In Control Panel, click on the icon for Programs And Features. At the list of installed applications, double-click on the Windows 10 Update Assistant to uninstall…