You have now 1RET83WW (2.10) bios and Embedded controller v.2.03. 1ruj37us.exe contains official bios version 1RETDRWW (3.23) for ThinkPad R50, R50p, R51 (type 1829, 1830, 1831 and 1836) & ThinkPad T40, T40p, T41, T41p, T42, T42p Note from Lenovo: - This BIOS version will only work with Embedded Controller Program Version 3.04 (or higher). Please obtain the additional package Embedded Controller Program Version 3.04 (or higher), and update Embedded Controller Program in the system with it. - If you need to update Embedded Controller Program as well as the BIOS, update BIOS first. To use 1RETDRWW bios with WLAN whitelist removed you must install official 1RETDRWW bios (and update Embedded Controller to version 3.04 too) first.