LOLcakes wrote on Apr 14^th, 2013 at 8:03am:

Lost in Isaan wrote on Apr 13th, 2013 at 1:25am: Next time you see it or anything else strange in FSX hit the 'V' key and capture it for the world to see. That explains why I seem to have an ever increasing amount of screenshots in my FSX folder!  :o Now I finally know where they have all come from...

The worst thing about it is that they are BMP files of about 7.7MB each (in my case), whereas converting them to JPG files, they are only 713KB (1/10 the size) and so that saves a lot of space too. It is too time consuming to convert them all though. I wish MS had made it so they were saved as the smaller JPGs instead of BMPs.