If your OptiPlex 790 is not connected to the internet, use another computer to download the driver and transfer it to your OptiPlex using a USB flash drive.
Many third-party sites bundle drivers with adware, spyware, or ransomware. If your OptiPlex 790 is not connected to
on Windows 7 is by using the official Dell Support Site . It ensures stability and security. Avoid generic "driver updater" software that tries to charge you, as Dell provides these for free. as Dell provides these for free.