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HP Z440 Workstation

Dear all, I have two similar HP Z440 stations, drivers, software all updated Hardware exchanged among each other and no change

 

as soon I use the ethernet LAN connection I get Bad Pool Caller and a blue screen

 

If I use my iPhone connected to USB A port I have no problems..

 

If i attach the LAN Kabel, I get Bad Pool Caller

 

ALl tests with HP software, Windows and Avira Pro checked and screened...

 

I would assume it is a hardware problem, but here again two stations and same problem??

 

I need help 😞

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