With both the previous Fall Creator's Upgrade and now new Spring Creator's Upgrade Windows Defender Offline Scan works until a new cumulative update comes out. After the first cumulative update is installed, whenever I run a new scan, Offline Scan stops at the point where it is suppose to go into a reboot and returns to the main menu. Not sure why the cumulative updates seem to break Offline Scan, but would appreciate any help with this issue.