Cannot open or reinstall the newest Ccleaner/Windows 11

[hazelnut]

Have you done a full restart (not shutdown) of your machine after uninstalling all ccleaner products?

Then try first with 6.39

How to Roll Back from v7 to v6.39

We now have numerous posts from users dissapointed with the new v7 and asking if/how they can roll back to v6.39. Whilst normally I would say that you should use the latest version that works on your machine I also believe that you should have the choice to roll back from a major feature update. Particularly if/when that update is flawed. So here is how to do it using the official v6.39 installer (so that you don’t have to download a possibly dodgy* v6.## installer from a 3rd party website): …