Ok, it took me a while but I figured out the problem. I could not see my thumbnails anymore and my "Show window previews (thumbnails)" was greyed out. Here is how i fixed mine...
-Click on your start menu and type in "services" in the search box
-Open up the first "Services" you see which should have a cogwheel next to it
-Scroll down to "Desktop Window Manager Session Manager", the "Status" should show "started" which mine did not.
-If yours doesn't either, right click the "Desktop Window Manaher Session Manager" and click on "Start"
-If start is greyed out, click on "Properties" and then change the "Startup Type" to "Automatic" then click "ok".
-Now, right click the "Desktop Window Manaher Session Manager" and click on "Start"
You should now both have Aero working again and be able to see your thumbnails for your taskbar again.
If not, make sure they are still checked when you right click the taskbar, properties, "Show Window Preview (thumbnails)"
I hope this helped.