I used to use advanced system care 3, but it is a resource hog.
Now I use Glary Utilities . why? Not for the reg cleaner, (which seems good). I know in older versions the registry cleaner used to wipe some files, like the desktop.ini file, that tells your computer what file to display in mycomputer, but that seems to have been addressed, now. but all the other apps:
Batch Uninstaller:
you can set batch mode, and hit uninstall, it goes bang, bang, bang. it is HEAPS more efficient than the windows uninstaller. Just be careful though. I have seen it uninstall programs that weren't ticked.
Disk Analysis:
it gives you a visual overview of where your space is being taken up on your drive, so you can find big files/folders and take any needed action.
Duplicate Files finder:
the name says it all
disk cleaner:
remove temp files and the like
file undelete.
handy for deleted file recovery.
(I use Easeus Data Recovery Pro For the more serious stuff)
file shredder.
if you want that folder gone-gone.
file encrypter.
if you want that file private.
registry defrag.
it can make the registry significantly smaller. I have never had a problem with this tool.
PLUS the One-Click-Optimiser:
the item that you were just asking about. I disable the spyware and track remover tools.
I use sysinternal autoruns for the startup manager. becareful. it is not a tool for beginners. You could seriously do some "interesting things" to your computer with this app.
for spyware I tend towards
spybot S&D.
It is freeware, and up to date. usually, it can seem to be doing not much. I find it finds the most stuff in the last moments of it's scan.
or
Malwarebytes
I usually only use these when something is already gone wrong on a client's PC.
but I run ESET Smart Security on all my stuff, and have no need for SS&D. (I am a licenced reseller for ESET, the best out there in my personal opinion.) I will not provide a link to it, as I do not wish to appear to be selling anything.