I have a Chromebook, a Intel Celeron Chromebook I think, that I want to get completely reset. I downloaded the Chromebook Recovery Utility app. I followed the on-screen prompts and I got to where I needed a USB and I didn't have one. I had exited out, came back and now I can't press anything because it only says preparing and won't allow me to get past this step. Is there a way to fix this?