Lenovo Thinkpas Factory Reset

Hi,

I have a Lenovo Thinkpad E530c laptop which I need to reset to factory.

On startup. pressing F11 brings up the Lenovo recovery tool to do this, however, because the laptop is setup on a network, it says this cannot be used. It instructs me to login and use the tools within the OS.

I cannot login because the trust relationship between the laptop and server is corrupt (which I also can't fix).

Any ideas on how I can access the recovery tool, perhaps by creating a new login to use (I don't know the local admin password).

Thanks