maayi wrote:
I was just downloading software so that i could download free music and MACKEEPER popped up warning me that my Macbook required immediate clean-up
Since this happened immediately after you installed software for downloading "free" music, it's likely that that software was a scam and included either adware or MacKeeper, or both. If you are trying to download commercial music for free, that is illegal, and any sources you are going to find are going to be criminals... you should not trust anything they give you. In some cases, even real malware has been distributed through such channels. Even sources of legitimately free music should be treated with extreme suspicion until proven otherwise, as that may be done by scammers mis-using free content as "bait" to get you to download something.
To remove any adware that might be installed, see my Adware Removal Guide. (Fair disclosure: I may receive compensation from links to my sites, TheSafeMac.com and AdwareMedic.com.)
To remove MacKeeper, see:
http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/