Yes, I would install Recuva. It's perfectly harmless and shows deleted files on your disk. As deleted files are overwritten when new files are created not all deleted files going back to year dot will be shown. If you run a deep scan Recuva will find many more deleted files, but will take hours to run. You can recover whatever files you chose so malware - unless it is hidden in a valid file you chose to recover - will not be recovered. Not all files you recover will be valid, as they may have been partly or wholly overwrtiien.