Open Windows Explorer and right-click on the operating system drive (usually C:).
Then select Properties from the context menu.
Then click on the Disk Cleanup button.
After it scans the drive the Disk Cleanup window will open. Click on the Clean up system files button.
Once the next window opens check off the box for Windows Update Cleanup (and any other ones that you want to also remove) and click on OK. This can that take some time, so find something else to do. And hopefully, that should clear up some space.