system password unknown

Recommended by Wim's BIOS...

I have acquired a fujitsu ergo pro X with ami 64 mach bios.
My bios is locked by a administrator password which is unknown to me or last owner.

Can anyone help me clear this password?
removing the battery (for two weeks) dit nog help only cleared cmos.

[Rainbow]

http://www.fujitsu-siemens.co.uk/rl/servicesupport/techsupport/consumer/top10.htm