HP Z440 E5 V4 Unable to change virtualisation settings

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I have a Z440 E5-1650 V4, I want to change the Bios to enable Virtualization. I have found the settings in Security in System Security however when I enter the settings the cursor is one the first setting I cannot press enter to change the setting or move around the settings all I can do is use the left or right cursor keys to exit the page.

[DGroves]

set the bios back to "factory" defaults

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It appears I can’t change any settings or even the date and time, I have found a workaround by using the BiosConfigUtility to set the relevant settings. I have tried bios reset but to no avail.

 I have even tried using an HP USB keyboard instead of the KVM, I don’t have a PS2 keyboard to try but all are the same.

 Using the utility I can change any setting so that gets around the immediate issue but I need to sort it.