The keyboard "copy" function (CNTL + c) quit working on my up-to-date Windows 7 Home Premium all of a sudden. The "paste" function (CNTL + v) worked but I was always getting the old stuff in the buffer. The toolbar Edit/Copy worked. I looked around and didn't like the answers I saw. I finally determined it was due to Skype running (a program I don't use much). I shut Skype down and everything's back to normal! Hope this helps.