I too have this issue - I have recently had Windows 8.1 pro installed on my laptop and when I try to copy and paste words/web address etc using CTRL C & V function it does not work. Now I am not technically gifted to know what this means:
************ RESOLVED **************
All you have to do is disable "Send to Bluetooth" Add on running under some of the Microsoft Office application. Most of the times you will find it under Add on in outlook.
Where do I look for this as I cant find any office application, the only one I use is Notepad and I cant find any Bluetooth setting on that.
Another thing I have just noticed is that if I press delete key then its adding another line as if I was pressing enter!