Problem With Aero Peek And Screensaver

I upgraded from Vista to Win 7 Pro, everything was working fine until a few days ago. The Aero Peek flashes for a second then goes away. Also the screen saver doesn't kick in or sleep or hibernate. I did a repair install and then a complete install also uninstalled the video card driver and and put it back on, but still nothing. I did notice when I have the device manager screen open that peek will work with everything that is open. The only thing that was changed to the laptop is that I hooked it up to a TV through the VGA. Also I deleted the old files from Vista that were stored in C:windowsold. Haven't touched the register.

Anything that I hoover over that should show a display of some sort (such as picture, that will show the date taken, and size) it will only show for a second then disappear.

Also did a sfcscannow which showed no problems.

System Manufacturer/Model Number Dell, Vostro 1000
OS Windows 7 Pro, 32-bit
CPU Mobile AMD Sempron Processor 3600+, 2.0GHz
Memory 2gigs
Graphics Card ATI Radeon Xpress Series 128mb
Sound Card High Definition Audio Device
Screen Resolution 1280x800

Mouse Microsoft USB Wireless Mouse (IntelliPoint)