Installation instructions:

1. Open the bios_original folder and run 7uuj49us.exe to install the official Lenovo version of the 3.24/3.25 BIOS.
2. Restart the computer and press F1 to enter the BIOS settings. 
3. Write down the BIOS version on the main BIOS screen (7UET94WW or 7VET95WW)
3. Create a bootable DOS USB drive using the guide here: https://www.howtogeek.com/136987/how-to-create-a-bootable-dos-usb-drive/
4. Copy the entire ThinkPad_T400_7UET94WW_7VET95WW_NWL folder to your bootable DOS USB drive
5. Boot from the DOS USB drive and navigate to the proper directory based on the BIOS version you found in step 3:
ThinkPad_T400_7UET94WW_7VET95WW_NWL\7UET94WW
or
ThinkPad_T400_7UET94WW_7VET95WW_NWL\7VET95WW
6. Run flash.BAT to install the modified BIOS
7. Restart the computer
