I've used CCleaner for many years without issues and yes, a backup before using it is a wise decision.
Best decision is to use a drive backup. I use True Image.
Beta testers best friend
Also, don't defrag the C drive if it's an SolidStateDrive.
Im with Zardoc
Backup, backup, backup. You will regret it if you dont
.. .after the blue screen i had. and the only choice i had was to reinstall my system and install new drivers.for my desktop.
Thanks for advice.i will not use anymore 3rd party optimizers and registry.
"Maybe" it was the root of my bluescreen because i tried updating my drivers and yet problem still occurs.
Thanks for those who tried to help esp. DeanP . .
I have tried various registry cleaners over the years and every time they have caused more trouble than they fixed, even CCleaner.
I do use CCleaner to clean up internet history, cookies etc but I UNtick the boxes in the Registry Cleaner section.
I use Revo Uninstaller when uninstalling programs. It cleans up registry items and files related to the specific unistalled program.
I refuse point blank use a general registry cleaner.
ccleaner in particular likes to delete a certain set of nvidia registry entries that can cause problems when removed. I know this from personal experience.
I'd much rather do a brand new fresh install of Win7 from scratch once a year or so. I've only tried a "cleaner" once, in WinXP, and the resulting problems were insurmountable. Ended up just reinstalling WinXP from scratch and then all application software, as my way of "cleaning house".
Of course you take a selectable recoverable backup of everything first, so you can restore your various program settings, documents, and data, which usually go in \Users or \ProgramData or maybe in \Program Files.
Almost always if you pre-restore the contents of a program's \Users or \ProgramData folder before you install the program, it will discover what's there and almost always pretty much put you back where you were with your previously installed version of the program. If not... well, at least you can probably restore the program's data after it gets installed, usually.
Anyway, I've not used any such cleaner product since that one ill-fated experiment.
WinXP typically began to show signs of "aging" after about 6 months. Win7 is much more durable, and my initial install went over 1 year before I voluntarily chose to reinstall from scratch (because of new and significant hardware upgrades).
I'll always go with a fresh OS reinstall as the best solution to any serious performance degradation problems.
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i tried it. i cant uninstall my nvidia drivers because of this resulting to system crash! BSOD... .