BIOS update in WINPE (Lenovo)

Hi guys,

I'm hoping someone has come across this issue before.

Root Issue:
Unable to Activate TPM during TS using Lenovo provided scripts.

Cause:
BIOS versions from a certain point in time and earlier are unable to activate TPM using Script.

Resolution:
Update Lenovo BIOS to a later version (1.43 is current at the time of this post)

My issue:
Applying the lenovo BIOS update during WinPE im getting the "incorrect function" error when its attempting to run the setup.exe
Now im guessing this is because winpe is limited to when type of files it can run. And .exe not beign one of them.

MY TS step as follows:

Run command:flash.bat

Flash.bat contents: %~dp0WINUPTP.EXE -s

TS package containing WINUPTP.EXE and other associated files.

Using x64 bootimage

CM2012 SP1

Hoping someone can help

Thanks