Need help finding an unknown admin password

I've watched every video on YouTube, tried going on websites but I still cannot find an admin password, I cannot edit settings on BIOS, what can I do?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0