I was given a gateway desktop
pop the casing, disconnect the power supply to the mother board, remove the battery.
Leave it out for around 10 minutes, then re-insert battery, reconnect power cord. turn computer on, you will find all settings are default, and it will pop up a screen asking you to confirm the changes.
hard drive
amount of ram etc etc
it will also give you other options. like boot order etc etc

it might not be the simplest way to do it, but it will work.


either that or just take to it with a hammer or something....


cheers
f2b