Why does Eusing find hundreds more to clean?

I've been using CCleaner for a long time now and have been very happy with it and I like the simple interface. Recently, I downloaded another application called "Eusing Free Registry Cleaner" and began using it after first using CCleaner.

After cleaning the registry with CCleaner, Eusing Free Registry Cleaner finds hundreds more registry keys to clean. Just before posting this, Eusing found 223 that CCleaner missed.

Is there some reason why Eusing appears to be substantially more effective?

Is there some way to make CCleaner just as effective as Eusing seems to be, so that I can just use CCleaner?

They're called False Positives.

Many registry cleaners will find valid registry data, therefore Eusing isn't the only culprit. With such registry cleaners you must know exactly what you're doing and hunt down every little thing they find, or you trust them and allow them to possibly butcher your system with a possible end result being a format and reinstall of everything. In any event do the following:

Make a System Restore Point before using registry cleaners!

i like CCleaner because it is 100% safe, and it has never deleted any important/needed files from my system. (i've never had any problems)

i have used other registry cleaners.. unfortunately they deleted important files on accident, and i had to reinstall my OS to fix it.... ;) so be careful

if you are going to use Eusing, i would suggest looking through all the registries it wants to delete.. make sure none of them are important..

only delete the ones that you are -posotive- you don't need

it's possible Eusing might find more useless registries then CCleaner.. just be a little cautious when using it

i would suggest looking through all the registries it wants to delete.. make sure none of them are important..

only delete the ones that you are -posotive- you don't need

That's the whole problem with registry cleaners by far, they give a list of hundreds of "invalid" items then people are expected to go hunt down what it found. Obviously there aren't too many people patient enough to hunt down hundreds of "invalid" entries which is what can and does make many registry cleaners completely dangerous to use.

In any event I'd bet that not even 20% of what's found and listed is even "invalid."

Registry cleaners should come with a big warning label that reads:

Don't trust anything I list as invalid.