what happens when you press the V to take a screenshot ?
check that the V is set to the default screen shot key in
FSX > Settings - Controls
you might have to take it out of full screen mode to do the screen shot.
how long ago did you upgrade ?
if it was withing a month you can revert the system back to windows 7
click the Start menu and select
Settings. Click the
“Update & security” icon and select
then select back to windows 7
You can do it yourself using the instructions above or if you like i can remote in and fix it for you. It will be cheaper than having somebody come in to do it for you. And i have 30 years experience in the industry i doubt that your local guy will have that.