Thanks, that seems to have done the trick.Microsoft support had disabl;e the driver called passthruparser - so these setting effect this driver.
Press F2 during POST->BIOS setup pageà Advanced-> Processor Configuration ->
set Intel(R) VT for Directed I/O Enable - This was enabled
set Coherency Support Enable - This was not
set ATS Support Enable - this was not
set Pass-through DMA Support Enable - this was not
We will test this against the other two systems we have and advise.
Thanks again Dan_O