I have a fairly new Macbook Air (moved from Windows). In the last couple of days I did something stupid going to a bit torrent site from a YouTube page trying to download a program for free. I know, I know - nothing is free. When I went to that site I then clicked on something that automaticlly DL'd DPlayer Installer. I never did get the free program. But now I have Mackeeper popping up (full screen) at various times, plus other similar sites, when I do a google search and other smaller popup ad boxes too. I trashed Dplayer, got Easy Find to get rid of remnant files & Mackeeper, but stuff is still popping up. I don't know what to do except do a full restore. I saw the the directions - looks fairly simple. I can back up the little bit of data I have, and then wipe it. I have not set up Time Machine. Is there a way to restore the Mac to just a few days ago like Windows, or is it all or nothing?