Actually you can clear the BIOS password by resetting the CMOS jamper.015012If you are familiar with CMOS jamper it is easy for you. Open your015012laptop with the use of screw driver. Once you are already open it015012locate the CMOS jamper near the CMOS battery at the south bridge of015012your laptop motherboard. Remove the jamper with in 5 seconds after that015012reinsert and trun on your laptop.

The cmos battery trick doesnt always work better off looking for a service manual and look for the jumper location , you have to shut-off laptop &remove hdd, main battery and lower cover to locate jumper place wire between triangle contacts plug in power cord , hold wires on contacts then turn on laptop it should go past bios password if not try again , then set for repair system , then change to boot from cd , then install your windows o/p system . check out http://tim.id.au/laptops he might have your service manual .

Repair Help & Product Troubleshooting for Acer 4220-2346 Notebook

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