All the registry cleaning software i download only clean about 30 of 10000 errors found. It either tells me to buy online or upgrade using UNIX pre-mode… what do i do?

I am looking for a microsoft registry cleaner but have heard that regcure is unsafe from this site http://www.registrycleanersrated.com but have heard at other sites its the best. This site says it can damage your PC, so now im confused on what registry cleaning software is the best. Thanks

I need something that does it all; ie, registry cleaning, virus targeting,problem-solving,speed-incfreasing,garbage-removing,et
. Kinda like an overall optimizer..