Sorry, new to this type of thing. Had to set up a new computer with win 10 (64bit) as well as office 2016 (64bit). Everything seemed OK until we fired up Excel, then the nightmare began. Working with 2 open Excel files cutting and pasting back and forth as I did with Excel 2007. A ridiculous number of problems soon occurred the worst being the Excel not responding and taking anywhere up to 20 minutes to process a single cell move. Played with the settings and managed to get it down to about 20 seconds but this is totally absurd. Now when I highlight a block of cells and right click I get a pattern in the middle of the highlighted area which looks like 2 columns of 3 grey dots with a circular arrow above the 2 columns. It reminds me of a text formatting where you can click on the circular arrow and drag something in rotation. Haven't tried this because I have never experienced this in Excel and I don't know what to expect and possibly screw up a lot of work in the mean time. Has anyone else seen this or had experience with this and how do you stop it?