The Intel update tool tells me the there are Wifi and Ethernet driver updates along with the Intel® Killer™ Performance Suite (which should have all the drivers).

I installed the said version but theI Intel updater tells me that there are still updates. Trying to install the suite again end in the installer asking me if I want to uninstall the installed version.

Ok. Let'ts take the drivers from here the Dell update site

Wifi driver ok, Ethernet driver comes along with the Ethernet suite which is incompatible with the generel Killer performance suite.

Used a Killer uninstaller to get rid of everything, restarted the computer and tried the performance suite again. Intel updater keeps telling me that there are newer drivers and the my software is not up to date.

Maybe related to an error from the Windows store.

Part of the whole thing is the Killer Controll Center

Can'T be installed because of a 0x803FB005 error.

What should I do?

The drivers from Dell are the wrong or older ones and incompatible with the performance suite and for whatever reason the Killer Control Center cant be installed.