For this you need a toolkit USB loaded with a live CD tool as (deprecated, but still functional) "Hiren's Boot" or its spiritual successor (and loaded with tons of useful tools, very recommended!) "Medicat".
{% embed url="https://medicatusb.com/" %}
{% embed url="https://www.hirensbootcd.org/" %}
There's instructions/scripts to install them on a USB in their webs.\
Once you boot the live CD there's a section with various password removal tools that edit the SAM file and let you change/remove the pass easily with a graphical interface. Just select the account you want to remove the password and follow the steps.\
{% hint style="warning" %} If live CD doesn't load directly and BIOS has a password, meaning you can't change boot order, you would need to open the system and remove the CMOS battery located in the motherboard for a couple minutes, so the BIOS resets to default. {% endhint %}
{% hint style="danger" %} Be very careful when editing SAM files and never do it on production systems if there's other way, as it can corrupt the file and leave the account inaccessible! {% endhint %}