My audio has been crackling and popping for months so I decided to edit my registry editor by editing the conversationidletime which I read to do somewhere but as I was shutting down an update was trying to install. At shutting it down and switching it back on, the laptop got stuck on loading hp screen and now it doesn't even do that but immediately takes me to automatic repair which none of the options I've tried is working and I will do anything but reset the pc to factory as I really need my files. What should I do?