Boot to CD in UEFI mode

Client has 1 year old Dell Win 10...
There were 2 profiles...Sharon and Norma...
Norma's profile...the current user...had disappeared...does not appear as an option on the login screen...
Sharon's profile is a local profile...she no longer works for the company and they do not know her login password...

I need to be able to boot the computer and create a new profile for Norma...

I have several bootable CD's that I used on Win 7 to reset the admin or any user password on the older OS's...
Both Linux based and Win PE based...None of them work with UEFI on this Dell PC...

If I change to Legacy mode...and change boot order to CD first...it will NOT boot at all...

If I leave it in UEFI mode and try to change the boot order...I do not have an option for CD "first"...only Onboard NIC IPV4 and Onboard NIC IPV6 and disabled...

The default boot is Windows Boot Manager and evidently it cannot identify a CD in the drive and boot from the CD first....

Does anyone have a fix...workaround...boot CD recommendations that will allow the PC to boot from the CD while in UEFI mode...???

Apprecaiste any and all help and suggestions...
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Steve MutchlerIT TechAsked:
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CompProbSolvCommented:
Are you able to boot in Repair Mode, either from the main drive or from a USB stick?  If so, there's an alternate method for changing local passwords.  The basic idea is to rename utilman.exe (to save it) and then copy cmd.exe to utilman.exe.  When you reboot to the main drive, you click on an icon in the lower-right corner.  Normally it would bring up utilman, but it will do CMD since you replaced that file.  You can manipulate accounts from there.

If you need more details, just ask and I'll find a link.  It's critical that you can get to the command prompt to do this, though.
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Steve MutchlerIT TechAuthor Commented:
I went thru process of ren utilman.exe to utilman.exe.old...then copy cmd.exe to utilman.exe...
I rebooted and found the icon in the lower right hand corner and that opened CMD...

I was able to add my name as a new account...

I rebooted and I have an account without admin privledges...

I went back to cmd prompt at login screen to add myself to the local admin group...
net localgroup administrators steve /add
Reply was successful...

BUT when I reboot and log in with my new account...I am NOT an administrator...only a local account...

How can  I get myself as a local admin...???....I'm "almost" there...:)
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CompProbSolvCommented:
That's odd as it should have worked.
As an alternative, enable the default Administrator account:
net user administrator /active:yes
You should be able to log in as administrator, fix the other accounts, reboot, and log into one of them.  Be sure to disable the Administrator account when you are done!
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Steve MutchlerIT TechAuthor Commented:
I'll try that next...
BUT...in the meantime...
I got fed up messing with it and I reinstalled W10 from scratch...
Setting it up now...

As I'm working on the new W10 install...I;m seeing some fairly significant improvement in speed...
Kinda started me thinking that maybe there was something else wrong...

Any way...I'm on the way...
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Steve MutchlerIT TechAuthor Commented:
Many thanks for the help...
I've had about 3 of these W10's that forgot user pw...
I know I'll get a chance to do it again...
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CompProbSolvCommented:
Quite welcome....

It (renaming utilman.exe) is a good trick to know, especially since it doesn't require any special programs.
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Steve MutchlerIT TechAuthor Commented:
I agree...I wrote out the process so I would remember it..
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