I highly recommend this product. I use it myself and I set it up on all the computers I support.
The first tab is the Hard Drive
Cleaner section and is designed to free up disk space.
CLEANER NOTE: There are several items in the System and Advanced sections and even in the browsers that I personally want my system to remember; for example in the Advanced items, deleting Prefetch data can actually slow your computer down until it rebuilds this info. Here is a list of my selections but you should make educated decisions that work best for you:
The second tab is the
Registry Cleaner option. It will ask you if you want to create a back-up of the entries before they are deleted. It is ALWAYS a safe option to back them up (use a folder you will remember). Then in the very unusual chance that something would no longer work after your next reboot you can go to this back-up file and run it and all the entries will be reinserted into your registry. Then reboot and your registry will be back to the point before you ran CCleaner.
REGISTRY NOTE: I highly recommend you
remove the check of "Obsolete Software" in the registry cleaner section because it has been know to cause issues on some computers.
Please note that in order to keep CCleaner free they sometimes offer a toolbar or some other thing you may want to uncheck on install.