HP ProBook 450 G2, I received this laptop from an auction. This laptop has ibitlocker which is locking out the user from using an operating system, the system turns on, and the bios needs an administrative password to gain full access. selling as is, may have trouble turning on and off consistently, you can tap on the back of the laptop by the battery area and the laptop will turn on at some point. I've only tested to see if it turns on and boot. battery does not work.