HP Pavilion with Win 10.
I have double checked my end more then once since it started, up to and including a clean install of both the Installer and/or the Zip..
When I first started with the Arduino IDE I was able to write code, compile and run on my UNO but now all I can do is Highlight text/code. Cannot copy/paste highlighted.
Now on my Intel i5 desktop with Win 7 I do not have this issue and I have even tried backwards compatable to Win 8, 7 and even XP on the laptop.
I feel it is something simple but being in my late 60's I tend to over look the obvious.
John