Visual Studio 2010 debug not starting, F5 or click on “Play” not working, not doing anything. Waiting 2-3 minutes solves the issue

Question

I have a relatively simple C# (Framework 4) console application. When I click the \"Play\" icon or hit F5 (i.e. start the program in debug mode), the icon becomes gra

Answer 1

"Function Lock" ( Fn Lock) on some keyboards. This was completely unexpected, as I'd assumed I'd accidentally unset a key binding or something similar. Not so! - None of the function keys worked, then I noticed the tiny glimmering and baleful light of the Fn Lock key....