After you installed Network drivers, reinstalled the other drivers in correct order;

How to reinstall drivers in the correct order | Dell US

Or....

Run the Guide Me option in your Dell Product Support page. The tool will automatically detect driver updates for your system. Please follow instruction to run Guide Me option in the link below:

How to Find Drivers and Update Them (Official Dell Tech ...

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Please enter the service tag number (or use Detect Product} onto the link below, then install / run the Network drivers one at a time.

www.dell.com/.../