I'm up and have been on the phone with a very helpful Mac support person, even though my Apple Care has expired. He could have charged me but didn't. Last night, I was on Google and I clicked on a website to see if there was a Welcome to My World blurb and suddenly I got this warning thing that locked up everything on Safari - I could not get rid of it, and it said I had a security issue, that another computer was trying to access my stuff and to call the Mac number immediately to fix it. I forced quit Safari, I shut down the computer, but when I restarted and launched Safari that thing came up again, locking me out of doing anything on Safari. It was very scary, but I'm smart enough to know not to call any number that's not the official Mac support line. So, I went to bed, called Mac this morning and it was indeed a scam that some ASS felt necessary to do. And there's only one way to get it off your screen but it's easy as pie and I'm giving it to you now: Force quit Safari, hold the shift key down and relaunch Safari and it will be gone. Then reset Safari, which clears it from your cache and everything else. He also had me check a few other things just to make sure it hadn't done anything, then we did a repair disc permissions to make the computer work faster, he had me remove anything but iTunes and Finder that were launching automatically, we deleted Applications that I don't use and were unfamiliar to us. Then he said strongly that I needed to upgrade the operating system - I'm three OS's behind, so he sent me to the APP store to get the free upgrade to Yosemite, explained how that all worked, and it's downloading the upgrade now, and once it completes I restart the computer, then wait for about thirty minutes while it does its thing.