I'm trying to deploy an image from WDS to a Dell Latitude D505 laptop and I'm having touble with the PXE boot. All the latest NIC drivers are installed and in BIOS on page 3 of 7 in the setup in the boot configuration section under the PXE BIS Policy it was originally set to deny so I thought "ah that's what it is!" but seems not as now I have set it to accept it still won't PXE boot.

Description for this setting is: controls how the system responds to boot integrity services authentication requests when no cerificate has been installed. (how do I install the certificate then - assuming that this is/could be the issue)

Any help please.