Solution for blacking the sides of the screen after reinstalling win7

  

1. Right click on the desktop and select “Screen Resolution” in the menu, as shown below:

2 After opening the screen resolution page, in the resolution setting drop-down box, adjust the resolution to the highest (recommended), and then click the "OK" button, as shown below:

3, then A window pops up asking if you want to save the display settings. We click the “Save Changes” button as shown below:

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