When I do a Print screen it comes out all black for some reason? Any help?

When I do a Print screen it comes out all black for some reason? Any help?
If it has only recently started doing this, restart your computer.
That's why we seize the moment, try to freeze it and own it, squeeze it and hold it cause we consider these minutes golden.
Is it just one particular programme such as Internet Explorer or just all the time
Always lurking around, never really post.
I dont use internet explorer
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