If registry errors are getting you down, then the best thing that you can do is to clean out your PC and get it running like new again.  If you want, you can screen your PC for spyware using a program such as Spyhunter 4.  This program will help you to easily and quickly get rid of the spyware and adware that might be lurking on your computer and clean it out and make it like new again.  I suggest to most people that they look into this and get it going full speed ahead and they will have an almost new computer.