I have had error repair software in the past, but I am tried of paying $30-40 per year for a service like Registry Mechanic. Is there a software there that is less or is valid longer?
It would be helpful to know what OS you're running as some registry software is OS dependant.
CCleaner www.filehippo.com
regscrubXP for XP rigs www.softpedia.com
As always BACK UP the reg before you run any software that alters the reg.