What to do if “Network Discovery” does not turn on in Windows

Once I noticed on one of the computers that nothing was displayed in the network environment, and after selecting “Enable network discovery” in “Control Panel \ Network and Internet \ Network and Sharing Center \ Advanced Sharing Options”, the choice was still on “Disable network discovery”.
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How to change the welcome screen image in Windows 7

To change the welcome screen image in Windows 7, you must:

1) Open the registry editor, to do this, click the “Start” menu and in the “Run” line we write “regedit” and press the “Enter” key.

2) In the registry editor that opens, right-click on the “HKEY_LOCAL_MACHINE” line, select “Find” and in the search bar type “OEMBackground”, click “Find Next”.
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The solution of the error “d3dx9_31.dll was not found” when running games

This error may occur if the computer has an old version of DirectX installed, so it is solved simply by downloading and launching a web installer that automatically updates DirectX via the Internet to the latest version.

Download the DirectX web installer from the link below:

https://www.microsoft.com/en-US/download/details.aspx?id=35