My hard drive recently broke, so I replaced it with a different one. It worked just fine. I decided to clear out all personal files on it, but it downgraded to Windows 8. It still worked though. I did not want Windows 8, so I got the free Windows 10 upgrade that Microsoft provided. It was a legit one. So I restarted my computer, and it went to a screen with only the Dell logo on it. Not even the little circle loading thing. No progress bar, just the Dell logo. Mind you, it was working just fine before. I have powered it off, unplugged the hard drive, and yet, nothing. I don't know what I did, I also have an Ethernet cable into the modem. So, I honestly have no clue what's happening.