I just don't know what else to do. I don't want to go out and buy a new HD for nothing right now, especially since I would have to replace an SSD drive. I mean if I knew 100% that was the issue, then I would have no choice and it would be fine. It's just such a vague problem. Windows freezes about every hour or so, occasionally get the "NTLDR is missing" screen if it crashed and restarts on it's own. Other than that, I manually restart it and everything is fine for another hour or so. I am checking the wire connections, system temps, it's not malware, trying different boot options and orders, tweaking BIOS, etc and it just seems nothing is working. I don't even have an extra hard drive to check to see if it's my current one with the problems. I have a USB external, but it wouldn't read it when I tried installing Windows onto it. I am at my wit's end here.