Before touching anything inside the motherboard, make sure you unplug the power cable and ground yourself with a wrist-grounding strap to dissipate static electricity from the motherboard. It happens to be that there’s an additional step for this Dell desktop, there’s a jumper called PSWD located close to the motherboard’s power supply connector.Īfter the jumper is removed, the BIOS password can be reset by just removing the CMOS battery (CR2032) from the motherboard for a few moments and then putting it back in. However, this is not exactly the case for Dell OptiPlex desktop PC. In most PCs you can clear the BIOS password by taking out the CMOS battery for a while. Part 1: Remove Dell OptiPlex BIOS Password Is there a way to clear or reset Dell OptiPlex BIOS password? How to get back into your Dell OptiPlex desktop after forgotten Windows system password? Here I’m going to explain how to remove forgotten BIOS password and reset lost Windows admin password from Dell OptiPlex desktop computer.