minimized windows randomly popping up
I have a macbook pro running OS X El Capitan. Every 10-20 minutes, the taskbar disappears for a split second, the desktop (not the windows I'm working on) goes black very briefly, and then ALL of the windows I have open and minimized pop up at once. This includes chrome windows, finder, word, outlook, etc. I have tried restarting the programs and the laptop.
MacBook