CS2 - no more image thumbnails or image previews in folders

Since installing CS2 on my XP machine, I can no longer see thumbnails of images in folders, and I also can not see previews when I select the "filmstrip" viewing option for folders. What gives? Also, when I select File > Open, I click on a file, I see the preview below, but no thumbnail inside the folder view from the "Open" dialog box either.

Search for psicon.dll. It's been discussed to death for several years.

Bob