I have been a PC guy all my life and used to think i was fairly proficient with tech and IT. However about 4 years ago after having two kids i bought a mac to help simplify things. So here is my problem. I can't watch youtube ( it is very slow and jumpy ) I can't have more than 2 programs open at once ( slow, freezes, or takes me to the login screen ) and even if i have only one program open it is still slow. Okay so specifics: Mac mini (Mid 2011) (OS Yosemite 10.10.2) 200 GB free of the 500 GB hard drive 383GB free of 3TB External Harddrive 16 GM of 1333 DDR3 Ram 3 monitors Okay my questions. I have had 3 monitor set up for at least 3 years and haven't had a problem but i am wondering if that is part of the problem. but when i turn two of them off it doesn't get much better. I have my itunes and iphoto and stored on my external harddrive. I am not sure if that is causing some of the slowness. My CPU load playing youtube and typing this is about 40-60% with 40-50% idle. Also I have most of my documents on drop box. I am trying to free up everything i can on my internal drive and keep everything else on the external on the cloud. What am i doing wrong? Is it dying and on its last breath? Is there anything diagnostically i can do? Help! Thanks for looking .