Google for comodo registry cleaner. They have a new one out, in fact it's available as a portable that does need installed and I think it will find things, allow you to reboot and test for any problems before it actually deletes the keys. Not bad for free. I like it.
Thanks for the tip. I gave up on testing registry cleaners but decided to try Comodo after reading your post. It did a good job and the computer rebooted without issues. Thanks.