|"....it's not a lap-top, but hey some people don't have space or need for a big ugly computer like i do!..."|
When you have a desktop computer, in almost all cases, they are not as well protected as laptops or netbooks - the password info is usually stored only in the bios chip. To remove an unknown bios access or system access password, both of which are set in the bios settings, all you need to do is to remove the cmos battery on the mboard, or move the clear cmos jumper on the mboard, move it back, while the AC power is disconnected to the computer.
The reason for the cynical response 1 regarding a laptop or netbook system access or hard drive access password is that the person would need to know and use the password every time they used the computer - it's extremely unlikely a legitimate user, or a legitimate former user they got it from, would not know the password.
Laptops and netbooks made in the last ten years or more have an additional soldered in chip on the mboard the password info is stored on that cannot have it's contents erased by clearing the cmos on the bios chip, or by removing the power to the chip.