Yesterday I installed the KB3194798 Cumulative Update for Windows 10 1607 build on 2 Desktops and 1 laptop. They were all successful but took quite a while to download and install on each. When I confirmed that everything was working fine, I decided to run Disk Cleanup as an administrator and on all 3 computers, Disk Cleanup listed the size of the Windows Update files that could be deleted as 3.99 TB, yes terabytes! What was shocking was the fact that I only have a 250 GB SSD drive on my laptop, one PC has a 256 GB SSD main drive and a 2 TB secondary, and the third has a 500 GB SSD with a 2 TB secondary drive. Plus, the cleanup should only be referring to the main drives which were all less than 1 TB. The cleanup process took 20 minutes or longer on each computer.
So, how can Disk Cleanup list the Windows Update file size as 3.99 terabytes on all 3 computers?