Had that happen twice in the last 10 days..IE; Your not connected to the internet and freezes the computer.. .....Me, I couldn't figure it out, Gave a call[s]to Apple support.....They walked me through it.....When i asked the Girl how does this happen...She said sometimes clicking in a pop-up add will trigger malware .....
Yep....Mackkeeper....And she said to use it often...