A bit of a long shot, but I have a scansnap S300 scanner which is bundled with the scansnap organiser software. On the top bar the last button is an image of a magnifying glass and a paper ("Show/Hide popup thumbnails" is shown in the status bar on hover), which when selected should pop up a preview of the scanned document when you select one.
This used to work, but has stopped working. I am not sure if it is because I have a dual monitor setup and the pc has become confused and is opening the window off screen. However, even if this is the case the window does not have a separate taskbar button so cannot select move and move it over manually.
I'm reluctant to reinstall, but think that that may be the only option.
Has anyone encountered this problem and resolved it, or reinstalled and found it not to resolve it?