This on was a doosie but, I think we have made great progress. I ran into this while trying to re-image one of my PC's.

This screenshot is of the error message. Note: the number 6 in this screenshot will go up by one number at a time, each time you try to PXE boot it will go up 6 7 8 9 etc.
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1. Log into Active Directory Users and Computers.
2. Right click the Domain and select find.
3. Type your computer name into the computer name field and click enter.
4. Right click on your computer name in the search results field and select delete.
5. Click Yes to the delete confirmation.
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1. Log into Microsoft Endpoint Configuration Manager Console.
2. Expand Assets and Compliance.
3. Expand Overview.
4. Expand Devices.
5. Type your computer name in the search field and click enter.
6. Right click the computer account and select delete.
7. In the Confirm Deletion window, highlight the computer name and, click delete.
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1. F2 your way into the computer setup, also known as the BIOS.
2. Expand Settings> General> Boot Sequence.
3. Click the Delete Boot Option button until the list under Boot Sequence is empty.
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1. Expand Settings> System Configuration> Integrated NIC.
2. Put a check in the Enable UEFI Network Stack box and put a check in the Enabled W/PXE if there is no check in the box already.
3. Expand Settings> Secure Boot Enable, and uncheck Secure Boot Enable, and answer yes to the confirmation.
4. Click Apply then, OK, and Exit.
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1. Click F12 and go the boot menu.
2. Under Other Options select, Change Boot Mode Settings.
3. Select UEFI Boot Mode, Secure Boot OFF, and yes to confirm.
4. PXE Boot to your Onboard NIC (IPV4) and proceed with your re-image process.

This screenshot is of the error message. Note: the number 6 in this screenshot will go up by one number at a time, each time you try to PXE boot it will go up 6 7 8 9 etc.
_______________________________________________________________________________________________________________________________________________________________________
1. Log into Active Directory Users and Computers.
2. Right click the Domain and select find.
3. Type your computer name into the computer name field and click enter.
4. Right click on your computer name in the search results field and select delete.
5. Click Yes to the delete confirmation.
_______________________________________________________________________________________________________________________________________________________________________
1. Log into Microsoft Endpoint Configuration Manager Console.
2. Expand Assets and Compliance.
3. Expand Overview.
4. Expand Devices.
5. Type your computer name in the search field and click enter.
6. Right click the computer account and select delete.
7. In the Confirm Deletion window, highlight the computer name and, click delete.
_______________________________________________________________________________________________________________________________________________________________________
1. F2 your way into the computer setup, also known as the BIOS.
2. Expand Settings> General> Boot Sequence.
3. Click the Delete Boot Option button until the list under Boot Sequence is empty.
_______________________________________________________________________________________________________________________________________________________________________
1. Expand Settings> System Configuration> Integrated NIC.
2. Put a check in the Enable UEFI Network Stack box and put a check in the Enabled W/PXE if there is no check in the box already.
3. Expand Settings> Secure Boot Enable, and uncheck Secure Boot Enable, and answer yes to the confirmation.
4. Click Apply then, OK, and Exit.
_______________________________________________________________________________________________________________________________________________________________________
1. Click F12 and go the boot menu.
2. Under Other Options select, Change Boot Mode Settings.
3. Select UEFI Boot Mode, Secure Boot OFF, and yes to confirm.
4. PXE Boot to your Onboard NIC (IPV4) and proceed with your re-image process.