Mackeeper is DANGEROUS! I FOUND OUT THE HARD WAY. IT DESTROYED MY MAC WITH MALWARE. APPLE REPAIRED MY MAC AND FOUND MACKEEPER CAUSED THE PROBLEM. CALLED MACKEEPER ANF THEY'RE PLAYING DUMB. PLEASE NEVER PUT MACKEEPER ON YOUR MAC. IT DESTROYED MY WORD, AND EVERYTHING ELSE
Hopefully you had your personal file copied/duplicated off the Mac itself - typically dvd and/or an external hard drive. This as well as Time Machine backup running?
To add to to that, if you are ever tempted to put any fix-all program on a computer (Mac or otherwise) mostly they are pointless and as often as not scams or malware. Google the name of any product that you think you must have. For instance, if you put "Mackeeper" in Google there are stacks of warnings about it.
Always pop back and let us know the outcome - thanks