Only the most necessary hardware should be plugged into the computer when repair, reformat/reinstall are done on a computer. One monitor, keyboard and mouse, period. Nothing else unless you are booting from a repair disk or usb repair. You would boot to those and then work from that to do the work on "C".
That said, I have done some additional searching and here is what I found:
Trying to find out the cause of all your problems I looked back through your previous threads and I found that less than one month ago you had a thread here about being infected with the Trojan.Kotver.
https://forums.whatthetech.com/index.php?showtopic=130925#entry879819
I truly feel this is the cause of your present problems. That is an extremely serious trojan. Yours was found by your Norton program but virtually all anti-virus programs today will find it. It comes onto a computer in various ways, a drive-by download from a malicious website, from your email or any of its attachments – .exe files, archives, images, documents, bundled with downloads from various disreputable web sites, or one of the most common ways, file sharing with programs like the one you have on the computer, Frostwire.
This type of Trojan is well known to to corrupt or delete some of the data on your PC. It is also well known to be programmed to copy and send all your sensitive credentials to its dishonest creators who then get access to all your accounts and personal information, which may result in identity theft.
This trojan makes major changes to your registry. It essentially is hidden in the registry and programmed to automatically start the minute you boot your computer.
You were told by the helper in that thread to Uninstall all iObit software, it is well known junk. There is not a legitimate malware removal forum on the web that does not recommend that every single iObit software be removed. It can and does damage computers. You refused to remove two portions of this software.
You also were told to remove Frostwire, because file sharing is probably one of the easiest ways to get some of the worst infections. I did not see anywhere that you said you removed it.
You said you used Revo Uninstaller to remove the parts of iObit that you removed but your version of Revo is 3 years old and it appears to be the 32bit version. You have a 64bit operating system so a 32bit version of Revo will not remove all files because the 32bit version cannot see the 64bit files. So at least half of the iObit that you tried to remove essentially remains along with the two portions you said you didn't want to remove. It truly IS junk software, all of it and it can damage your computer even though you feel it is doing a good job. Virtually anything it says it can do can be done either manually or by reputable, free software.
You said you used the Norton Removal Tool which is well known, and of course recommended, BUT that is only one of four tools that are commonly recommended on all removal sites to completely remove this trojan. Since none of the other tools were used it is very likely some of its files likely remain. That is why I believe your problems now all stem back to that infection, it is still there.
that said the PC was having problems and needed to reboot and then did just that. It seems to now be in a reboot loop. My son thinks my MBF is corrupted from the Win download.