Over lunch my 120gb SSD went from 87gbs free space to a few MB. I restored from a Paragon image I had. What could have caused this? The only clue I "might" have is this past week I installed the latest version of CCleaner which now includes a dupe cleaner. I used it, examined the dupes and deleted them. A day or so later I had a strange PC freeze which has never happened since I built this in May. I just used W7 System Restore and all was good. Installed new CC version again and used the dupe cleaner again. If the removing a duplicate is causing either of these phenomenas it doesn't happen immediately. Any theories and thank you!
Thank you for the replies! All does now indeed seem normal. I used the Kingston (SSD) tool and it shows the drive (and all its attributes as being 100% healthy. If it was malware it got past both Norton A-V and Malwarebytes Pro.
edit: After reading these posts, more than ever I believe it was CCleaners new duplicate cleaner!