Also having this problem with 3 separate computers (Lenovo laptop, Dell desktop, Lenovo desktop) running Windows 10. In addition to the results message (of 99%), clicking on "Details" doesn't go to details, but instantly starts scanning again from 0%. Now all this might just be an annoyance except in the case of 1 of the computers, which I don't use often, is set to auto shut down after scan. But with this bug, no auto shut down.