THIS GUY IS A REAL DEAL! Had a bit of an issue with a CF-31 MK5 and I contacted him. I was able to get an os on another hard drive and get it booted up. He worked with me through a few hiccups and we got the ball rolling. After a bit he messaged me a password and it worked! This seller is a god send and I will send as many people as I can to him to help with the bios lock issue that seems to plague the toughbook series. If I could give over five stars I would!