Windows 7: taskbar thumbnails not showing up?

hi i'm new here...and i don't know if this belongs here...

but basically my computer crashed, i brought it to a computer repair guy who reformatted my computer (windows 7 32bit home premium laptop). I did not have my windows 7 disc...but i had my key...so he used his home premium disc and my key

but now its working perfectly fine but the problem is that the taskbar doesn't show thumbnails when I hover over the icons anymore (it used to before my computer crashed and i know my computer's graphics are capable of doing so)

i'm too lazy to make screenshots...but if what i said didn't make sense I found a link with some pictures http://helpdeskgeek.com/windows-7/windows-7-taskbar-not-showing-thumbnail-previews/

but the link doesn't really tell me how to fix it...it says something about changing the registry...but do i really need to do that...? it sounds kind of scary lol



ahh so frustrating...im basically getting the "text descriptions" as seen in the link...and the computer repair guy is kind far away from where i live...any help...?

Is your aero theme turned on?
right click your desktop > personalize > scroll up to aero themes section and select one.

It's possible you don't have your drivers installed, but i'd hope a shop would have the forethought to install your drivers after a format.

oh lol phew that was simple...my aero theme wasn't turned on...it was on unsaved theme...thanks for the quick response