Thurman

So I payed my monies and registered with "ccleaner', the I go to use it. I opened "ccleaner" up, the window came up, I try to run it and the window disappears and no "ccleaner" runs. Multiple attempts and it will not work. I try to send a message to "ccleaner' and a screen pops up telling me there is a runtime error. So far, I am not impressed with "ccleaner", can you guess why? Any suggestions? Thanks, David