Desktop is a black screen

[Skreedles]

For some reason every time I restart my computer my Desktop changes to a black screen, Furthermore my computer has started randomly stuttering.

[BentheMuffin]

For some reason every time I restart my computer my Desktop changes to a black screen, Furthermore my computer has started randomly stuttering.

Is this windows 8.1, and what happens when you boot into safe mode?

[Skreedles]

Yes, it is windows 8.1.

 

What do you mean exactly by "what happens?"

 

What should I be looking for?

[Minzo]

This happened to me when I used to pirate windows. It told me that it was pirated in the bottom corner. Might be the problem?