BIOS Dell Latitude 7400

I have acquired a Dell Latitude 7400, but when I tried to boot it up it asks for an Adminstrator or System password.

I tried flashing the bios but my ch314a won't read the IC. The chip itself is a winbond W25R256JVEQ.

I've used Neoprogrammer and AsProgrammer but neither were able to read it.

Am I doing something wrong?

btw, the S/N of my pc is 5W4NKM53-8FC8