Then try to create a new Administrator account. The steps to activate the build-in account "Administrator" are discussed in the articles linked below.Īctivate Build-in Administrator account in Windows – IĪctivate Build-in Administrator account in Windows – IIĪfter enabling the build-in administrator, reboot the system, login into the Administrator account. Then log into this new account and try to fix the broken user account. Try to activate the build-in account "Administrator". If booting into safe mode doesn't helps, maybe a trick will allow you to gain administrator privileges back. Solution #2: Try to activate build-in administrator If UAC works again, you can delete the faulty user account (but note, all settings and user files will be lost). If your system runs in safe mode, try to create a new administrator account, reboot Windows, log into the new administrator account and test, whether the issue is gone. Start your PC in safe mode in Windows 10.How to Start Windows in Safe Mode (Windows 8/8.1).How To Start Windows 7 in Safe Mode or see this Microsoft article.The steps are depending from the Windows version.
The first approach shall be to boot Windows into safe mode and try to fix the UAC issue. Solution #1: Try to boot Windows in Safe mode This is causing UAC prompt to fail or results in a grayed out UAC Yes button. Or a user has been logged in at a temporary profile.
Some cases discussed in Internet forums indicates, that something within a user profile is dramatically broken. I haven't had such a case till now – so I'm speculating here a bit.
Also in some cases people changing a standard user account to a guest account ending with loosing all administrator accounts. But I've seen many cases, where people have managed somehow, to disable their administrator account. In normal cases, Windows shall prevent an administrative user from disabling all Administrator accounts. Root cause #2: Administrator account has been disabled Booting in safe mode and performing a system restore can cure this behavior. I found several entries within forum, where this approach failed, and users are ending with a broken UAC. If only one user account is configured under Windows and if the password is left blank, an automated user login will be established. Root cause #1: Automatic login withound passoword It's also no more possible to create a new user account. So, a user can't confirm UAC and administrative task can't be completed anymore.
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