1. Click on the “WIN+R” key combination to open the “Run” window, enter the “regedit” character in it, click the Enter key, and the registry editor will open.
2, in the registry editor, click to open the HKEY--_LOCAL--_MACHINE--SYSTEM--CurrentControlSet--Control--ContentIndex tab;
3 Then, look in the window on the right, find the FilterFilesWithUnknownExtensions subkey and double click, and change its key value to 1 to ok.
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