I let CCleaner run its registry cleaner on default settings and afterwards my Office apps refused to launch, throwing activation errors. Spent an evening repairing the installation. A cleanup tool should never touch entries that break working software. Lost all trust after that.
Registry clean broke working software
CCleaner does a thorough job clearing junk and the interface is easy enough for my parents to use. My one gripe is how often the free version nudges you to upgrade to Pro with the real-time monitoring. The cleaning works great, I just wish the upsell were quieter.
Effective cleaning, easy interface
Frequent Pro upgrade prompts
It clears caches and junk reliably and the scheduled cleaning is handy so I don't have to remember. Happy overall, but during install I had to untick a bundled browser extension I didn't want. Pay attention during setup and it's a genuinely useful utility.
Scheduled cleaning, frees real space
Bundled extras during install
My five-year-old laptop was crawling and almost full. CCleaner cleared out temp files, browser caches and old logs and recovered nearly 30GB. The registry cleaner tidied up leftover entries from uninstalled programs too. The machine actually feels usable again, brilliant tool.
Huge space recovered, noticeably faster
I run CCleaner monthly on all the family computers and it keeps them tidy without any fuss. The startup manager helped me disable a bunch of apps that were slowing boot times, and the custom clean rules let me keep the cookies I actually want. Genuinely keeps these machines healthy.
Startup manager, customisable cleaning