I can't find a topic for asking a question so have chosen this one. I have used CCleaner (Windows 10) to clean unused space on some hard drives. I now want to do the same to my C drive which is an SSD. As usual it includes the operating system and programs. Question 1: Is it safe to use CCleaner to delete unused space on any C drive whether spinning or an SSD (which obviously has the operating system actually in use at that time)? Question 2: Is it safe to use CCleaner to delete unused space on an SSD (whether it is the C drive or any drive)? Thanks.