Can an application really make my computer run faster i.e. MacKeeper?
We do not recommend any of these types of applications, since from experience we have encountered more problems after they have been installed. It is best to perform some maintenance on your machine i.e. remove unwanted software, check for software or hardware issues and if required perform updates or upgrades. For further information on what real users have said regarding these applications, please read this forum http://forums.macrumors.com/showthread.php?t=689232.