Dell DDPE issue

Hi All

I support from last few months in one Big Company all users in Europe.

I got already few laptops back from users who have this DDPE pre login on it.

When users got new laptops and send me back old one after few months or more they year they do not remember login and password for it.

Policy is to change passwords every month so they do not remember it.

Sometimes main manager just gettings laptops and when he got few he will send to IT support (Me)

I do not have any USB file 

I have main admin passwords from other IT support who left company but I cant use it because first you must add user name / domain / password/

We do not need data from this hdd's any more but we needs laptops to run for tests in Production. 

Is there any Program we can run and connect hdd by USB and use main password to unlock it?

 Thanks

Pete