First, a bit of background: I often find myself opening folders that contain thousands of images. When I open a folder for which thumbnails have not been generated, Windows usually notices the action of opening the folder, and computes the thumbnails for the icons that fall under the current view.
Moreover, I believe Windows prioritizes the computation of thumbnails for those icons that are being displayed within the current scroll window.
However, this behavior is not consistent, and sometimes I open a folder and, no matter how long I wait, Windows does not update or compute the thumbnails for the images in the folder.
So my question is: Is there a way to force Windows 7 to always update or compute the thumbnails for those icons on a given folder as I browse it?