Get "rid" of Mackeeper! That is a good part of your problem of slowing. There have been endless comments in these Forums by the expert Users that Mackeeper is more like a Malware than a legitimate app, and it is documented as having adverse effects on system speed and stability. Feel free to do a Search in this Forum for "Mackeeper" if you doubt me.
Note: You will need to do a Google search for the means of removing Mackeeper. Its Developers coded it to be very difficult to remove. Simply dragging it to the Trash will NOT work.
Hope this helps
Message was edited by: Radiation Mac
A Radiation Mac says, get rid of MacKeeper. Here are Phil Stokes' instructions which have helped a lot of users get rid of the junk: http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/
Search MacKeeper and you'll get the picture.