My guess is he just deleted all of the checked box (I.e. he did not follow the advice in my signature) hopefully he did a backup but if not he must either do a sysrestore or reinstall. . .tell him from now on to follow my advice WOOT
So your quess is that it happened whit the registry cleaning action? Maybe the homepage & the dreamscene-desktop were somehow related to an error and therefor 'removed' by CCleaner?