I been using CCleaner but if UR using Firefox the 2.30version has some conflicts and takes long..they say to uncheck the 3 Exceptions in Security Options...Or U can download the 2.29 version instead till they fix the problems..I have also been using Eusing with it for about 3 years never had problems..tried Comodo Registry cleaner real good but too aggressive for me, so sticking to the 2, I been using...