I repair laptops for a living and when I get a Samsung laptop that is locked with an unknown bios password I use http://www.unlockbiosrecovery.com/Unlock_Samsung_Bios.php to get the bios master password for $20 and they guarantee it to work. Have unlocked many laptops with their service.
Detach the CMOS battery from the metal holder. Some Gateway CMOS battery holders have tabs on both sides, while with others you can lift the battery out. Press down on the tabs and the battery will pop out. Wait two minutes, then push the battery back in. This will change the CMOS settings back to default and reset the Gateway BIOS password. Replace the panel and cords. Turn on the PC and enter the BIOS menu by pressing F2 repeatedly to create a new password. To bypass creating a BIOS password, boot to Windows normally.
Then everything will be just fine.
Thanks.
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