I think it would serve you well to clean your registry!
*Please dowload: RegSeeker.
*Click on "Clean The Registry" in the left panel.
*Check all boxes (make sure the backup box in the lower left corner is selected!).
*After it runs, click "Select All" on the bottom, then right-click on any selected item in the window and select "Delete Selected Items".
*Click "Quit RegSeeker".
Now, open any of your installed programs, and make sure that everything opens ok. If so, reboot, then go back and run the RegSeeker again, do the same thing again if anything is found. When RegSeeker finds nothing else, then it's clean!