I downloaded the latest free version of CCleaner this past weekend. However, when I click install, a window pops up that says "CCleaner Installation" in the top left but there is nothing but a white screen anywhere else. No progress showing, nothing. When I installed, Norton popped up to say that CCleaner is safe to run, so I don't think that's the issue. Would appreciate any help you can give me. I'm not exactly tech savvy, so simple steps please lol.
It may well be Norton that is doing it.
Try downloading and installing the Slim build from the bottom of this page. Does it install now?
https://www.ccleaner.com/ccleaner/builds
Having said all that I would wait before installing 5.64 as it has quite a few issues which Piriform are trying to fix.
If 5.63 worked alright for you just re-install that.