My Surface Pro i7 8/256 and MS Dock are practically worthless now. I had used them since last July to edit photos while on the road. Two days ago I noticed my Dock file transfer speed from the internal SSD to an external Western Digital Black 7200RPM 3.5" drive starts out at the typical 100-130MB/s but almost immediately falls to 60-150kB/s! I spent two days trying to increase the performance with no avail. If I plug the external WD into the USB on the side of the screen it runs at the typical 100-130MB/s. MS suggested checking the Dock firmware. I needed and upgrade and did that. The performance was slightly worse. Now I am not sure if the recent update killed my Dock or if one of the several updates in the last two months was the cause. I also notice that I am having to click the left mouse button several times to get an action in Explorer, IE, Office 365, and other apps. I wish there was a cursor like the old hour glass to see that a click had taken. I have no feedback most of the time and wind up sitting for 10-30 seconds wondering if an app is launching. My Surface Pro was my favorite computer but it is rapidly becoming paper weight. I and trying to figure out how to go back to the software load that it came with and just scrap the Dock. Oh, and that recent disk problem was found because I wanted to make a backup so that I could send my Surface in for screen repair. A 1-2mm fuzzy white spot appeared near the center of the screen and was slowly growing. I'm not liking the updates.