I occasionally ran into some copy paste issues but was either X7 or X8 and was windows 8 or 8.1. I did notice that the problem was more pronounced if I had been working in Open Office. So I don't think it's a Chief thing. I used a  shortcut to a clear clipboard command-one listed here. http://www.techentice.com/clear-the-clipboard-in-windows-7/ and that helped out. I still use it now just out of habit when shutting down or switching programs.