Have been long absent from this thread because of all the provacative bickering, but now that you revealed that you have MacKeeper on your system, in additon to you searching the forums here about the mostly negative feedback about MacKeeper, I'll add my own comments, again, about MacKeeper and apps like or similar to it.
Apps like MacKeeper or any other maintenance apps like CleanMyMac 1 or 2, TuneUpMyMac or anything like these apps, installed on your Mac, these types of apps, while they appear to be helpful, can do too good a job of data "cleanup" causing the potential to do serious data corruption or data deletion and render a perfectly running OS completely dead and useless leaving you with a frozen, non-functional Mac.
Plus, these type of apps aren't really necessary. They really aren't.
MacKeeper may have done damage to your system that you are not immediately aware of.
There are manual methods to clear off unnecessary data off of your Mac that are safer and you have complete control over your Mac and not just leave a piece of auto cleaning software in charge of clearing off data off of your Mac.
These apps have the potential of causing OS X issues that outweighs the implied good and benefits these types of hard drive or memory "cleaning" apps are implied or written to do.
Plus, the software companies that write these apps make it hard to easily uninstall these apps if something DOES go wrong and these apps work in a way where you have no recovery or revert function to return your Mac back to its former, working state in the event something does go wrong.
If an app doesn't have an easy and direct way to be able to uninstall, it is an app that should be avoided and not even considered for download, installation and use.
It is best to never, EVER download and install these types of apps.
The risk to your system and data is too great a risk!
Here's how to properly uninstall MacKeeper.
http://www.macexpertguide.com/2012/11/16/uninstall-mackeeper-2012-2011-mac/