reg add "HKCUSoftwareMicrosoftWindowsCurrentVersionExplorerAdvanced" /v HideFileExt /t reg_dword /d 00000001 /f
taskkill /f /im explorer.exe
start explorer.exe
reg add "HKCUSoftwareMicrosoftWindowsCurrentVersionExplorerAdvanced" /v HideFileExt /t reg_dword /d 00000000 /f
taskkill /f /im explorer.exe
start explorer.exe