Two freebies that I have found work well, use one, clean up, then try the other and the only reports are ones that the other missed. Does that make sense?
Not all cleaners find all the errors, so worth using more than one.
Try EasyCleaner from Toni Arts, site recently moved, not sure where it is now.
And RegSeeker 1.45 from
www.hoverdesk.netBoth are available from most download sites, try
http://www.majorgeeks.com/ they have almost everything worth having.
I also use Ontrack System Suite 3, but this cost around ?40 but has a very good Reg cleaner and masses of other stuff. There is a newer version out, about which I know nothing. Package also includes PowerDesk Pro, an explorer replacement and which is much, much better.
Ontrack were taken over by Vcom a year or so back.
There are loads of others out there but EasyCleaner & RegSeeker are as good as anything else and neither are known for causing problems.
Do please check that they support XP, if that is what you are using, I'm still sticking with 98SE for the forseeable future. Tried W2K & hated it. Tried Ubuntu and within 10 minutes formatted the hard disk yet again.