Thank you for posting your question in the Microsoft Q&A forum.
Regarding your issue, may I kindly ask a few questions to help understand it better:
- Which Windows version is your device running (for example, Windows 10 or Windows 11)?
- Is your son’s account a Microsoft account (child account) or a local account?
- When you say you want to “restart everything,” do you mean:
- Removing admin rights from the child account
- Resetting account permissions only
- Or fully resetting Windows and starting fresh?
- Are there other administrator accounts on the PC that you can still sign into?
Hope to hear back from you soon.
The initial response may not fully address your needs, but it will help me better understand your situation. Once I get the information, I will try my best to find the next steps.
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