I was facing the same issue I searched everywhere but I didn't find any easy solution without installing some extra software tool.
So here is the simplest solution.
exit from vi editor
$cat
using above command you will see your all content which is in that file
select the content you want to copy (yes you can scroll on this screen while selecting)
don't click any mouse button because text will get selected automatically
open your text editor on windows and paste it there
Done
