Win7 system start menu is missing the solution

  
First Run dialog box, enter "regedit", click OK to enter the registry editor;

2, locate and then expand to HEY_CURRENT_USER //SOFTWARE //MICRSOFT //WINDOWS //CURRENTVERSION //POLICIES //Inside the EXPLORER;
3, then find the "NoDriveTypeAutoRun" key value of the DWORD value, change its value to 0, then exit the registry and restart the computer.

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