I too have been having this problem - also on Windows 10. I've been using CCleaner for over ten years, and everything was working fine up to and including version 5.41.6446 Since then (5.42.6495, 5.42.6499, and 5.43.6522) the program simply closes as soon as I confirm 'Run Cleaner' after a cleaner analysis - exactly as others have reported. I don't know what the problem is, or how to fix it, but I have found a "workaround". I don't really understand how or why this works, I just k