System Specs as seen on CCleaner:
CCleaner V2.27.1070
Ms windows 7 64 bit
Ccleaner delete "ActiveX/com Wow6432Node - notes link HKCR\Wow6432Node"
delete [HKEY_CLASSES_ROOT\Wow6432Node\*], [HKEY_CLASSES_ROOT\Wow6432Node\*\OpenWithList]... 41Mo the file cc .reg
the problem ccleaner delete HKCR\*
Merci.