You may remove the additional Intel SMBus entry - it was generated bei the IDU stuff.
If you restart your machine, the devicemanager will show an item with an exclamation. It is the SMBus Controller. Now just install the latest Intel Chipset INF Driver or the Intel MEI drivers.
SMBus driver is back again an no additionally entry in the softwarelist is available anymore.
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Okay, I uninstalled Intel SMBus. After a reboot, Device Manager did indeed show an unknown device. I downloaded the chipset driver and installed it. The unknown device is gone. Thanks for the answer.