You can try the option listed here.
https://support.microsoft.com/en-us/windows/change-or-reset-your-windows-password-8271d17c-9f9e-443f-835a-8318c8f68b9c
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When I went to bed the other night I updated and shut down my computer. See it's been needing an update. But whenever I've tried to update it it will not reboot up. So I did the thing where I would unplug and wait till it uninstalled the updates. It would than go back to normal and tell me I need to update. So I thought that night I would try updating and shutting down. But no. It did not work because now it will reboot or go to blue screen asking to sign in. Which I do but it says wrong password. I've used this password many times signing in. So it's not wrong. And that's it. I can't go past either screen. I'm stuck. Please help!
You can try the option listed here.
https://support.microsoft.com/en-us/windows/change-or-reset-your-windows-password-8271d17c-9f9e-443f-835a-8318c8f68b9c
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and Accept as answer
if the reply is helpful--
Some other options here.
https://support.microsoft.com/en-us/windows/recovery-options-in-windows-31ce2444-7de3-818c-d626-e3b5a3024da5#WindowsVersion=Windows_10
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None of these worked either.
Another option is a clean install. Boot the install media, delete / recreate partition then follow the prompts.
https://www.microsoft.com/en-us/software-download/windows10
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if the reply is helpful--