Found a solution that works for me.
Problem is not related to 32 or 64bit OS. It has nothing to do with the OS. In my case all computers that are failing are running 64bit Win7.
My guess is that there is an incompability with the UEFI and/or ISCSI support of the adapter and older DELL systems.
I did the following:
Removing Error Intel Networkadapter I210 – T1
· If there is an Intel Gigabit Adapter I210 – T1 (Manufacturing date after 06-2014) plugged in a PC,
· Concerns systems: DELL Prec 390 + T3400 + T3500, DELL Optiplex 780 + 790 and more;
· DELL Prec T1700, DELL Optiplex 7010 are working fine
· Plugin broken adapter in a working system e.g. Optiplex 7010 oder Prec T1700
· Install Intel networkcard management tools (Incompatible with Intel ProSet, if you use Intel
ProSet uninstall it first)
·· http://www.intel.com/support/network/adapter/pro100/sb/CS-023748.htm?switch=de
· run Preboot.exe
· install in in C:\Program Files\intel_network
· run CMD as Admin
· change folder to C:\Program Files\intel_network\APPS\BootUtil\Winx64
· run Install.bat
· Installation sucessfull when following message appears: Installation done! You can now invoke the tool.