In its first major Windows 10 update last week, Microsoft packed several improvements and enhancements, particularly to its browser Microsoft Edge, and newer and better apps.
The updates to Windows 10, which are mandatory, will be installed and run on the latest build (10586).
LifeHacker reports that there was 20GB space during a Disk Cleanup, which can be removed. To locate it, one needs to run the the Disk Cleanup utility. Upon the first scan, the “Clean up system files” needs to be checked. After a second scan, a “Previous Windows installation(s)” options appears, which includes 20GB worth of space formed upon installing the latest update. Checking that and the Temporary Windows installations files (which frees up additional 4GB) boxes will restore the missing hard drive space.
However, one needs to keep in mind that getting rid of these files will disallow one from rolling back to a previous installation of Windows, according to BetaNews.