Hello everyone, I am using a MacBook Pro (early 2015, 2.7GHz i5, 8GB RAM) and am running macOS HighSierra 10.13.3. My main problem is the finder. From time to time, it will stop reacting to the mouse input (cannot click on files or folders), but it will still react to keyboard input. This problem usually just disappears after a few minutes of not clicking or force quitting finder. Also sometimes when I move the finder window, a small, see-through version of the finder will stay on the display (I attached a screenshot of this). This window stays even after force-quitting finder and can neither be moved nor clicked on. Recently, I also noticed, that sometimes the minimization doesn't work correctly. (I attached another screenshot of this: the safari window stayed like this, until I reopened it a few minutes later). I also encountered other problems such as frequent freezing and crashing of Preview, PowerPoint and Excel. These problems all started before the HighSierra update, but have become much worse since then. Also I already clean-installed macOS High Sierra, but the problems stayed. It would be really great, if someone could give me tip on what to try to solve this.