I have a 2011 MB Pro running 10.11.1. It was running great (!) before I updated to El Capitan. Now, it's running horribly - Word and PowerPoint seems to be feeling it the worst. Both programs are constantly crashing. Very often, with PowerPoint, it is unable to render any images in the document - just shows a bunch of red Xs. I am getting memory warns often too. The only change was the "upgrade". Is there anything I can do to fix this? Thanks!