Which version of ccleaner did you install (5.45 or 5.44)?
45 had an issue where it started automatically with windows. .44 is back up as the latest version.
If you were trying the .45, will you be willing to retry with slim that's up now (.44)? By the way nothing in ccleaner is different betwen slim and regular. Slim just doesn't include bundled software (avast, google toolbar, chrome) in it's installer.