Error on start unexpected realtime delay task 0 or task1

"I remember that from the days of Linuxcnc when it was EMC2 on Ubuntu 8.04, had to add that for older laptops.
Not sure if that would help, and not sure that disabling that will have such an impact on computer speed. It is used for the ability to use more than 15 IRQ ( interrupt requests ) but i have never seen anything use IRQ's over number 15, ever"

My PP card has an IRQ of 16, so maybe its
this?

Check if hyperthreading is disabled, that is a must.
Then see if there is anything about disabling C states.
IRQ 16 is ok, it all depends on what it is shared with and if there is anything you can do about changing that?
Also having an SSD helps a lot for preventing latency excursions, but if you got that same error from a live session, see if you can change the above before moving to SSD.

Yes Hyper is disabled, C states is not ticked so I assume that's OK its something I changed. I will remove the second NIC and see how that goes.

Now IRQ 18, same issue

OK.....fun 3rd day.

On my other CNC I found the parport module was not loading, loaded it and the 6040Z ran fine on PCI card. Swapped in the PCI-e for the PCI and again the 6040Z ran fine. So Ive left the PCI-e card on the 6040Z. The 6040Z's PCI card is in the Dell 9020 MT and there is no task0 or task 1 alert so it looks like that particular PCI-e card and the Dell 9020 motherboard seriously didnt like one another, so problem solved. I will go order a spare PCI card, thanks for the help.