All I have open is firefox, no videos or anything. Usually the amount in the CPU bar is less than half a centimeter, but now it's over half full. I don't know what it is doing, but the bottom of the computer is pretty hot, and I can hear the fans. What is my computer doing? The temp of the cpu is 160° F. E: I checked the processes and canon_ip said 99% (my printer), but that application isn't open, i'm not plugged into the printer, and in the activity monitor, that is not listed as a process. I restarted my computer, thinking that would end it, but it did nothing. Now what can I do?