Post upgrade WinPE errors

As most of the companies I have upgraded my SCCM to 1610 as well, The upgrade passed successfully without any issue.

But from at point, I cannot deploy images or reach to WinPE anymore.
This is the client side while waiting to WinPe {F12}

Here is the log from SMSPXE:

<o:p></o:p>

I have more 8 DP's which are not working as well, same problem.
I tried to uncheck and check the PXE from DP's did not help, I tried to clear
PXE requests  didn't help restart the services as well.<o:p></o:p>

restart
WDS didn't help. I created new BOOT Images and checked the @Deploy this boot
image from the PXE-enabled Distribution Point@ and it doesn't work.<o:p></o:p>

I do
not think it is related to WDS services. something is very weird here.<o:p></o:p>

Also
here I hear something very similar:<o:p></o:p>

https://prajwaldesai.com/install-sccm-configmgr-current-branch-update-1610/<o:p></o:p>

Guys,
what do you think the problem is it?, I have spent 4 days for this problem and
do not understand what is wrong.<o:p></o:p>

I have
Windows Server 2012R2 post upgraded from Server 2008R2.<o:p></o:p>

Anti-Virus
is disabled.<o:p></o:p>

IP-Helper
allowed<o:p></o:p>

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