I want to uninstall some apps and ccleaner forced to update to ccleaner7 and it deleted all my pc data including ccleaner7. All my apps and work data are completely gone.
You would have to tell us exactly what you did in CCleaner7 for us to know/guess what damage you may have done with which tool.
As a first guess though, did you use the ‘Disk Analyzer’ and ‘Batch’ delete every duplicate file that it found? (Without checking what those files were before deleting them en-mass).