데스크 탑 컴퓨터에 Windows 10 (7 또는 8 일지도..)을 사용합니다.
admin user password를 까먹었는데 복구방법있다면 알려주시면 감사하겠습니다.

Unfortunately, it’s not so straight forward. You can try one or more tries from the link below
https://www.top-password.com/knowledge/reset-windows-10-password.html

Good luck