@DavidR,
I'm afraid it would want a password for windows and if it did I couldn't remember what it was. Now when I restart my computer, it shows Dell, then please wait, and it doesn't ask for a password. It just shows signing in and after a few seconds it shows my desk top
Why would you need a password, should it remain the same should you use the Dell Media DVD for the system. Currently your Dell appears to be setup without the requirement of a password. They may well have recommended to set a password.
Even if you had to create a password as I did when I first got my win10 laptop, I created one using the usual strong password strategy. What If I forget, well I check the source that I made a not of it. I must have in excess of 50 or more passwords, for the most part using a password manager caters for those internet passwords. And backup, backup, backup to cater for computer issues.
So here I am on my usual song, you need a Strong Backup and Recovery Strategy (to cater for all eventualities) or if you Fail to Plan, then you Plan to Fail or if you don't want to Lose it Back it up.