Yes, you may delete those manually if you wish. See if this program can clean it out. It's pretty good:
*Download RegSeeker http://www.hoverdesk.net/freeware.htm and install it.
*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 RegSeeker again. Do the same thing again if anything is found. You may have to run RegSeeker 5 - 6 times, but you want it showing none to very few items.
*Make sure to reboot between each use of the program.
Any other problems before I close this topic?