PXE-MOF : Exiting Intel boot agent

Recieved the following symptom after bouncing a distribution point which is also the WDS server for a site. Clients trying to PXE boot recieved:

TFTP.

PXE-MOF : Exiting Intel boot agent

This issue was caused by the permissions on C:\Windows\Temp being reset and locked out for everyone.
The result is clients trying to boot from WDS cannot access the files they require.
These are stored in C:\Windows\Temp\PXEBootFiles\Windows\Boot\PXE\

Restarting the WDS service can sometimes resolve it.

However, if this is the permissions issue there is a bit more work involved.

1. Remove the PXE Service Point role from SCCM
2. Remove the WDS role from the server, this will reboot the server.
3. Take ownership of the Temp folder, and reset permissions (include all sub folders and files)
4. Delete the Temp folder
5. Create a new Temp folder
6. Add the WDS role to the server
7. Reboot
8. Add the PXE Service Point role in SCCM
9. Re-add the boot images

Obviously wait on each step to make sure roles are removed especially in SCCM.

Information thanks to: http://grahamhosking.blogspot.co.uk/2011/08/problems-with-pxe-boot.html