To get the best free network drivers for your Dell OptiPlex 790 running Windows 7, you should download them directly from the official Dell Support website
1. Executive Summary The Dell OptiPlex 790, released in 2011, originally supported Windows 7 natively. However, as of 2026, Dell has ceased direct support and hosting of legacy drivers for this product on its main support pages. Users reinstalling Windows 7 often face the "Ethernet Controller not found" error. This paper outlines the safest, most efficient methods to download the correct network drivers for free, ensuring stability and security. To get the best free network drivers for
before the network driver to ensure the motherboard recognizes all components correctly. Support for OptiPlex 790 | Drivers & Downloads | Dell US Match driver to hardware and OS:
Solution: You need the Universal Audio Architecture (UAA) Hotfix (KB888111) or the Microsoft Visual C++ Redistributable packages (2010, 2012, 2015). The Realtek installer silently fails without these. Install them first, then retry. For Intel adapters, use Intel’s PROWin or Ethernet drivers