well looks like that's 1 problem down. Now lets try the other.
Firstly, lets check whether you have Windows Aero selected.
Right-click the desktop > Personalize > Windows Color and Appearance > Open Classic appearance > Select Windows Aero
Right-click the TASKBAR > Properties > Check the option "Show Window Previews (thumbnails)"
That should do the trick. Let me know how it works out for you =)
Bill Gates is a very rich man today... and do you want to know why? The answer is one word : versions. - Dave Barry