If you have accidentally locked your Gateway computer or desktop, you should follow some steps to unlock it. First of all, you should check your system settings and change them to default. If your keyboard has been blocked, go for a keyboard option in settings and undo it. You may also press the “F2” button while restarting your desktop. If these options do not work, you may deactivate “NumLck” key. Now, shut down your computer for a while and restart it to check if it works.