New PC setting up windows 11, entered a bad birthdate, no cannot sign in

Hi Bob Nix,

I completely understand how frustrating it is to be stuck with a child account because of a simple setup mistake, especially on a brand‑new PC. Now, as the Q&A Assist has explained, since the account is permanently treated as child (as there's no "parent" to lift that), your best option is to create another one correctly this time.

You can either pre-create a Microsoft account or/and then clean reinstall using external Windows 11 installation media. Find instructions on how to perform it by navigating to the bottom of this guide: Reinstall Windows with the installation media - Microsoft Support.

1. On another working PC > Download the official Windows 11 Media Creation Tool
2. You need a USB (8 GB or larger) to create a bootable drive following the guidance
3. Boot the USB into the new laptop > reach Disk selection: Delete all partitions
4. Select the unallocated space and continue > complete laptop setup again.
5. This time enter a correct birthdate to confirm the user is an adult.

I know it’s frustrating to hear that a reinstall is required on a brand‑new machine, but since the account is set in place, clear it all and start over is the only option.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Because the Microsoft account was created as a child account, its birth date cannot be changed to make it an adult account, and the family/parental controls cannot be bypassed. This is by design to prevent children from changing their age and removing restrictions.

In this situation, the practical options are:

1. Stop using that Microsoft account on the PC: Since the account is permanently treated as a child account, it should not be used as the primary Windows sign-in for this device.
2. Set up the device again with an appropriate account
   • During Windows 11 setup, choose either:
     • A new Microsoft account with a correct adult birth date, or
     • A local account (no Microsoft account) if cloud features are not needed.
   • Use that adult/local account as the main sign-in on the device.
3. If the child account must remain in a family: A parent/guardian account can adjust its permissions and restrictions via the Microsoft family sites, but it still cannot be converted into an adult account before it reaches the legal age for the configured country/region.

For future setups, always use an adult account (or a local account) as the initial Windows sign-in on shared or organizational devices, and only add child accounts later if family features are actually required.

References:

• how to change date of birth child to adult - Microsoft Q&A
• How to change a birth date on a Microsoft account
• Fix family features after Windows 10/11 upgrade