I am not the administrator of my own computer, i think i have been hacked.

Dear @Dorothy Nelson,

Thank you for posting your question in the Microsoft Q&A forum.

We apologize for any inconvenience you may encounter when using our services/ products. Based on your description, kindly try these following steps:

System file repair

• Navigate to Command Prompt (Run as Administrator) > type:

sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

• Reboot when complete.

Regaining administrator on a personal Windows PC

• Check your account type: Settings > Accounts > Your info. If it says Standard, you lost admin rights.
• Enable the built‑in Administrator (temporary):
  • Hold Shift while clicking Restart > Troubleshoot > Advanced options > Command Prompt > type:

        net user administrator /active:yes
        net user administrator <StrongPasswordHere>
    

  • Restart, sign in as Administrator.
• Create a new admin user (recommended):
  • Settings > Accounts > Family & other users > Add account > create a new local account > set Account type to Administrator.
• Disable the built‑in Administrator again (for safety):

    net user administrator /active:no
  

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Hi Dorothy,

Please open a Command Prompt window and run the following commands:

net user %username%

net localgroup administrators

Post the output or screenshot here.

(The output tells you whether your account has admin privileges or not.)