My computer has been fine for years until yesterday whenever I turn my computer on, the screen where it's supposed to say "loading Windows" gets stuck at a full black screen with a blinking underscore. I then have to manually restart the computer and then hit F12 to go to boot mode and select the first one on the list for Windows to start normally. I've done virus scans and nothing comes up. Everything seems to work as normal once I'm inside Windows but its annoying to always go to Boot mode for it to work.