Screen became dark grey all of sudden

hiimyourfriend

Prominent
Dec 31, 2017
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Hi, I bought my gpu on January 2018 and never had this issue. The whole screen suddenly turned into dark grey, but I could still see my cursor as normal color and others really dark. I could perform Restart while this happened , although it was dark greyish. What is happening?
 

hiimyourfriend

Prominent
Dec 31, 2017
126
0
690
2


After restarting my PC , it's back. What could have happened there?
 

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