Angels have the Phone Box
To check for corrupt system files, run sfc /scannow.
To remove malware lurking in the shadows, run AdwCleaner, then Malwarebytes Antimalware Free.
If still unsuccessful after this, you might just want to copy your user files to the new admin account and delete the old account. Actually, if you delete the old account, Windows will ask you if you want to delete the data as well; you can say "no", and it will save the user data in a folder on your new desktop. But if it were me, I would copy it over myself first.