Sorry, you are in a situation I do not recognize.  All I would do is clean the drive and start over.  If the options, from Dell, are not allowing you to re-do the install I don't know where else to go. I have seen that TPM message and I selected clean it, which seemed to work.  If you can find it in the Bios, you might try turning it off.
Hi, not sure if this is the right place to post my issue but here goes. I recently bought a second hand XPS 13 9365 2 in 1 and unfortunately the previous user has left their Account On (for which I do not know the Password) and so I am trying (so far unsuccessfully) to Reset it Clear it and add create my own Admin Account and login. I can Boot the Laptop by pressing Shift and I can select 'Housekeeping', 'Clean PC', 'Remove Everything' & then Select 'Cloud Download' (but this quickly returns 'Unable to Download, Use Local Install'. So, I select 'Local Install' and I confirm 'Fully Clean Drive'. Sure enough the laptop displays 'Getting Things Ready' and then proceeds to 'Reset This PC' and shows 'Resetting PC with a percentage'. It gets up to some 28% and then displays (in small font at top of screen): 'A config change was requested to clear the this computer's TPM' 'Warning: Clearing erases info stored on the TPM . You will lose all created keys and access to data encrypted by these keys' 'Press F12 to clear the TPM' 'Press ESC to reject this change request and continue' I have tried both Options and both cause the laptop to Reboot, display 'Preparing' and then display 'Undoing Changes'. All I am trying to do is Clean the Laptop so that I can create my Own Login Account. (I have to admit I do not fully understand what the TPM is or does, but would have thought one way or another I should be able to Reset it Clean. Any help will be greatly appreciated! Thank you in anticipation.   (a small further compliaction: the  but when I enter it here it is not found. .  As it happens I have another XPS 13 and in order to be allowed to submit my query I am using that here!)
Unable to Reset XPS 13 9365