reset windows - TPM message - now stuck in loop

Hi there,

I have tried to reset windows 10 on my xps 13 9360 laptop and got a message to press f12 to clear TPM or press esc.

WARNING: This request will remove any keys stored in the TPM  

Press F12 to enable, activate, clear, enable, and activate the TPM

 Press ESC to reject this change request and continue"   

I clicked f12 as it was advised on a dell forum, 

https://www.dell.com/community/Precision-Mobile-Workstations/Windows-10-reset-TPM/td-p/7376705

but now the laptop is stuck in a loop,  shows the Windows Logo, Windows Logo with Welcome below, Blue screen that looks like its about to carry on setup but disappears quickly then repeats.

any ideas on how i can resolve this? 

Regards,

Clive