but why there is this f.... password?
and why is it so diffuclt to remove
thanks in advance
So in case some as.h.le steals the laptop, or some loser buys a stolen laptop, all they get is a paperweight.
The way it's supposed to work is you set the Startup and HDD passwords the same, and Supervisor passowrd to something different. The startup and HDD passwords protect the machine from being turned on without the password. The Supervisor password allows the startup and HDD passwords to be overridden or removed without knowing them (but you have to know the Supervisor password), and it also protects the BIOS settings.
So in a corporate environment the company can set the Supervisor passwords on all their machines the same, and let users set the startup and HDD passwords to whatever they want. If a user dies or leaves the company, the company can remove the user's passwords with the Supervisor password.
If someone steals the machine, they can remove the startup password by pulling the CMOS battery out for a few seconds, which clears the CMOS. But after clearing the CMOS you have to go into the BIOS to set the date and time and confirm the settings. If the Supervisor password is set you can't, and it can't be cleared without special equipment.
Unfortunately, sometimes used machines are sold without BIOS or HDD passwords, but with an unknown Supervisor password lurking inside them. If some event (such as pulling the CMOS battery) triggers a need for the Supervisor password, you're screwed.
Replace the system board or pay someone with the right equipment to remove it - but as the previous poster said, a system board for a 600 is probably way cheaper than the recovery services.