I had the same problem after the latest update! Before then everything ran smoothly. I have now resolved the missing dll files, but I do wonder why an 'update billed as having great improvements you are sure I will like' removes this essential file!
My problem is a general slowing down of everything since the last update last week which began with the screen 'We have some exciting improvements for you' or words to that effect. No option not to allow the "update". Since then I have experienced lock-up necessitting rebooting the computer...