So now you in your old administrator account or the new one? If you back your old administrator account, and it don't work, with all those AV setting you said worked before done to it.
Please try the following:
The above command should assist with replacing any damaged or problematic system files. Please note, however, since it may require restoring certain files, this process can take some time and you will need to be patient until it has completed.
Please let me know whether this resolves your problem or if you have any additional questions.
Stardock Community Assistant