My screen is getting black, means the back ground desktop pic has completely turned black and I am getting?

your windows isn't geniune thats why you are getting this message. There are 2 ways of getting rid of this. 1. buy windows 2.pirate windows. I can't tell you how to pirate windows (YA would ban me) . So your best bet is to figure out how to pirate windows (activate windows) or just buy an original copy of windows.