The `SteamOverlayVulkanLayer64.dll` file is likely associated with the Steam gaming platform, developed by Valve Corporation. This DLL seems to be specifically related to the Steam Overlay feature in the context of Vulkan, a modern graphics API. The Steam Overlay provides in-game access to various Steam Community features, web browsing, and the Steam Store, among other functionalities, without the need to exit the game. The inclusion of "Vulkan" in the file name suggests that this particular DLL is designed to ensure compatibility and functionality of the Steam Overlay with games and applications that use Vulkan for rendering graphics. Vulkan is known for its high efficiency and better performance on multi-core processors, and it's increasingly adopted in modern gaming and graphics applications.

Given the "64" in the file name, it's tailored for 64-bit systems, ensuring that the overlay works seamlessly on 64-bit versions of games and applications using Vulkan. Issues with the `SteamOverlayVulkanLayer64.dll` could potentially disrupt the normal functioning of the Steam Overlay in Vulkan-based games, possibly preventing access to overlay features or causing graphical glitches. To address issues related to this DLL, ensuring that the Steam client is up-to-date is a good first step, as Valve frequently releases updates to fix bugs and improve functionality. If problems persist, verifying the integrity of game files through Steam or reinstalling the game may help. For more persistent or complex issues, consulting Steam's support resources or community forums may provide additional solutions and troubleshooting steps.