I am pretty new to Windows 7. I installed the upgrade (Home Premium) on my Vista desktop last night and it went pretty well. I noticed, however, that when I hover my mouse over open programs in the Taskbar it's not showing a preview of the window. Instead it's showing a box with a small icon and the name of the program: I'm pretty sure that right after the upgrade it was showing the preview but I'm not sure what changed. Does anyone have any suggestions? Any help would be greatly appreciated.