I purchased a 2nd hand T4020 from a laptop shop and now I am facing some bios issue. The bios prompts me for password when I tried enter Bios setup via F2 button. I contacted the laptop shop and the laptop shop does not know the password to the bios either. A few question: 1. Is there any master/backdoor password I could use to bypass this? 2. Can the bios be clear by removing the CR2032 battery and put them back after 1 minute, just like Desktop mainboard? I tried using programs like !bios and killbios, they failed to crack and clear the bios to what I wanted killbios is able to clear my bios, including the date time till 01/01/2005, but the password is still around... If 2nd solution is a possible solution, i will return the laptop to the shop, ask them to disassemble the laptop and remove the cmos battery to clear the bios.