What happened to thumbnails of my pictures!!!???

The current image is set not to show thumbnails of your pictures (the default setting in Windows 7).

To see all of the images in a folder, press F10 to turn on the Menu Bar.  Click Tools - Folder Options - View Tab.

Uncheck "Always show icons, never thumbnails."

This may slow down the laptop, especially if there are a lot of files in a folder, so you may want to check it when not