[NF] Mac PC infected with MacKeeper

Hi all,

I have a friend that thinks he got infected with "MacKeeper" (whatever that is). He thinks it happened when he clicked on a link in Safari that was supposed to be updating his Adobe Flash.

I'm not sure that is the name of the malware. He says that whenever he tries to do a google search it says something about needing to go to Apple (apple.mac-xperts.com ???)  - and any link he clicks on that result takes him to a "phone number" (I did not see his screen either). It also appears that his default web page gets switched to Firefox or something like that.

Does anyone know about that, and if so, how to get rid of the problem on the Mac?

TIA, -Charlie