registry,cleaners?

need some feed back on registry cleaners ,have tried some all they seem to do is screw my computer up.should I stay away from them,I try to follow all of ther guidelines to no avail,and I am not a computer super tech,nor do I know anyone who is.

I have read bad reviews of some free downloads and no longer know what to trust. But i definately need to speed up my system and get it back to its old self.

Registry Cleaners?

Can anybody recommend me any free registry cleaners (good ones that don’t stuff up your computer) available for download suitable for win xp?

I found 2772 invalid entries on my computer. Is that a lot?

I found CCleaner one with good feedback from users.

Computer Help?

What are two examples of malware? (Choose two.)

A – registry cleaner
B – pop-up blocker
C – spyware
D – e-mail
E – grayware

the latest ones thanks