Final answer:
The first step when video card driver installation fails is to locate the latest version of the driver from the manufacturer's official website, ensuring compatibility and resolving the issue.
Step-by-step explanation:
When a video card driver installation does not complete after replacing the card with one from a different manufacturer, the first step you should take is to locate the latest version of the driver. This is important because the latest drivers are designed to fix bugs, improve performance, and ensure compatibility with the latest systems. Make sure to download the driver from the manufacturer's official website. If the latest driver does not solve the issue, you may then need to consider other steps such as reinstalling the driver, rolling back to a previous version if the new one is causing issues, or in the worst-case scenario, reinstalling the original video card to ensure that the issue is indeed with the driver and not the hardware.