They have a small Windows icon on them. I find them most annoying, yet there must be some good use for them. The Windows keys can be quite useful and are identical in performance. I am sure that you have found out that pressing either one of them is the same as clicking on Start with the mouse. When used in combination with other keys however, they can perform useful work.
Most people have different applications for which they like to use the keys.
With E, it pops up the Explorer, while with F1 I get the Help menu. Some of my friends have different choices. To get a list of all the functions available, I checked in Help. Copyright 2000 by R. G. Services.