For end users, 1.0.39.1 is obsolete but harmless. For developers, it is a historical artifact, useful only for legacy testing. Part 10: Final Verdict – Leave It Alone or Uninstall? After this deep dive, here is the final, actionable advice:
Version represents an early but stable release in Vulkan’s lifecycle—one that many users encountered when they first upgraded to Vulkan-capable drivers around 2016–2017. Part 3: Anatomy of Vulkan Runtime Libraries 1.0.39.1 When you install Vulkan Runtime Libraries 1.0.39.1, what exactly lands on your hard drive? Typical Installation Location On a 64-bit Windows system, the core files are found at:
Reinstall your graphics driver or download the Vulkan runtime from LunarG. Alternatively, copy vulkan-1.dll from a working PC (not recommended – better to run a proper installer). Issue: Multiple Vulkan runtime entries in Programs & Features Cause: Each game or driver update installed its own copy. Vulkan Runtime Libraries 1.0.39.1
Check for VK_LOADER_DEBUG environment variables. Remove any validation layers from C:\Program Files (x86)\VulkanRT\1.0.39.1\Config . Or simply update to a newer runtime. Part 9: Should Developers Keep Version 1.0.39.1? For game and graphics developers, the question is different. If you are maintaining a game or engine that specifically targets Vulkan 1.0 features and you need to test on the oldest possible runtime, keeping version 1.0.39.1 in a virtual machine or test environment is valid.
Update your driver. If your GPU is very old (e.g., Intel HD Graphics 2000, NVIDIA 400 series or earlier), it may not support Vulkan at all. In that case, uninstall Vulkan runtime – you cannot use it anyway. Issue: High CPU usage by Vulkan runtime Cause: Extremely rare. Usually a misbehaving game or a buggy validation layer enabled accidentally. For end users, 1
If you value a clean program list, by all means, uninstall it after confirming you have a newer runtime. But if you ignore it entirely, your PC will continue to run just as well as it always has.
For most users, version 1.0.39.1 is a digital ghost: a leftover from an earlier driver or an install of Doom (2016) that has since been superseded. It does not harm your PC, spy on your activities, or slow down your boot time. It simply waits, ready to translate Vulkan commands into GPU instructions, should any application call upon it. After this deep dive, here is the final,
This is normal. Keep only the newest version (highest version number) and uninstall older entries like 1.0.39.1 after verifying that Vulkan still works. Issue: Vulkaninfo shows “Failed to create Vulkan instance” Cause: Your GPU does not support Vulkan, or the driver is corrupted.