So I refreshed my laptop last night after a situation involving a black screen on boot after trying to reinstall an intel driver. Now my PC is back to the old windows 8 and factory settings with some files intact. However, there's a file I have now called Windows.old and I'm not sure what to do with it, and my sound says that no audio output device is installed. For now, all I know that I need to do is get all the updates again and put windows 8.1 back in. If there's anything else I need to do, please say so, and thank you in advance.