Remove BIOS Password for Sony Old Model

Remove BIOS Password for Sony Old Model
(use 7 Last Digit of Serial Number)

Support for old model (Chipset 915 or less): PCG-C, PCG-F, PCG-GR, PCG-GRS, PCG-GRT, PCG-GRV, PCG-GRX, PCG-GRZ, PCG-N, PCG-NV205, PCG-QR, PCG-R, PCG-SR, PCG-SRX, PCG-TR, PCG-V, PCG-VX, PCG-X, PCG-Z, VGN-B, VGN-FS, VGN-S, VGN-T, VGN-TX1, VGN-X
Very simple, tell me 7 Last Digit of Serial Number, view below picture:

Then you will receive password for unlock your Sony Laptop