Hi Efiae. I'm Greg, an installation specialist and 9 year Windows MVP here to help you.
If you were able to enabled built-in Admin (used only for emergencies BTW) then you need to Log off and then log back in using the new Admin account with no password.
You should then be able to create a new Admin Local Account by the same name in Settings > Accounts > Family & Other People, sign into it, move your files over, test all programs run correctly: http://www.howtogeek.com/226540/how-to-create-a...
Then when ready you can delete the old in the same place as above, and convert the new account to your MS account if desired:
https://www.tenforums.com/tutorials/5375-switch...
If this doesn't work then I'd Reset using the deep clean (back up files first) https://www.zdnet.com/article/windows-10-tip-re... or if that fails do the Clean Install which should get you past all difficulties as it has millions of others who have followed the steps in this link and never come back to report another problem: http://answers.microsoft.com/en-us/windows/wiki...
You may need to create bootable media to access Repair Mode or do the Clean install:
To create Windows 10 Installation Media on another PC install Media Creation Tool and follow the directions here: http://windows.microsoft.com/en-us/windows-10/m.... Uncheck the box for Recommended Settings to choose the exact version and bit rate for the target PC only.
Insert media, boot it by powering up PC while pressing the BIOS Boot Menu Key: https://www.sysnative.com/forums/hardware-tutor...
If the media won't boot you may need to enter BIOS/UEFI Setup (pressing key given in chart in link above) to turn off Fast Boot or Fast Startup first.
Choose the boot device as a UEFI device if offered, on second screen choose Repair Your Computer, then Troubleshoot Options to try a Reset.
If that fails choose Install Now, then Custom Install, then at the drive selection screen delete all partitions down to Unallocated Space to get it cleanest, click Next to let it create needed partitions and start install - this makes it foolproof. Everything needed to get the best possible Clean Install is here: http://answers.microsoft.com/en-us/windows/wiki.... It is a better install than any amount of money can buy and a great learning experience that will make you the master of your PC because you will learn what works best and how to apply it with your own hands.
I hope this helps. Feel free to ask back any questions and keep me posted. If you'll wait to rate whether my post helped you, I will keep working with you until it's resolved.
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