Win7 boot desktop black Tip window copy is not a genuine solution

Recently Xiaobian reinstalled a dual system, win7 and win10 dual system, but when I entered the win7 system, the desktop turned black, and the window copy in the lower right corner is not a genuine watermark, I will teach below After everyone has this situation, how to solve it quickly, no need to download any software.

1. First, we click on the Start menu and enter CMD in the search box.

2, then find CMD.exe

3, right click and select Run as administrator.

4, so we enter this interface, we enter SLMGR -REARM in the interface >, you notice that there is a space bar.

5, then click OK to restart the computer.

6. Finally, you can change the desktop. After restarting, there will be no blackening of the desktop.