Since Dell’s live support page for OptiPlex 790 only offers Windows 10 drivers now, use their FTP archive :
Look for the Intel Desktop 825xx Gigabit Platform LAN Network Device driver. Click the blue Download button to save the executable ( .exe ) file to your computer. How to Install the Network Driver
once the installation completes to finalize the network setup. Method B: Manual Installation via Device Manager Since Dell’s live support page for OptiPlex 790
Never use third-party "driver updater" software. They often bundle malware or install unstable, incorrect driver versions.
If you are still having trouble, consider checking your hardware connections or reviewing the Dell Support Knowledge Base . Method B: Manual Installation via Device Manager Never
Dell provides a tool called for systems running Windows. If you manage to get an internet connection (e.g., via a USB Wi-Fi dongle), you can install SupportAssist. This tool automatically scans your OptiPlex 790, identifies your service tag, and finds all the latest recommended drivers for your specific Windows 7 build. However, for a true "fresh install," the manual methods above are your lifeline.
For the best and safest free download of for Windows 7 , use the official Dell Support site to ensure hardware compatibility and security. Download Sources Dell provides a tool called for systems running Windows
However, after a fresh Windows 7 install or a system crash, you may find your internet connection isn't working because the network drivers are missing. This article provides the best, free, and safest methods to download and install the Dell OptiPlex 790 Network Drivers for Windows 7 (32-bit & 64-bit). Why You Need These Specific Network Drivers
This is, without a doubt, the best option. The drivers are guaranteed to be safe, official, and tested for your specific hardware. Follow these steps: