If you forget password of any windows account, use hiren boot cd/ dvd or bootable pendrive to reset windows account password or unlock the account, for older computer use hbcd 15.2 launched in year 2012 which system ram equal to or less than 1gb and for modern computer use Hbcd pxe x64 iso. For making hbcd bootable pendrive drive use Rufus freeware on internet.
1.HBCD iso download link . https://www.hirensbootcd.org/files/HBCD_PE_x64.iso
2.Rufus download link https://rufus.ie/en/#download