| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | | Previous VulkanRT or driver update left stale files. | Reboot and run installer again. | | “Windows protected your PC” (SmartScreen) | Unknown publisher warning for ancient installer. | Click More info → Run anyway (only if you verified digital signature). | | “Vulkan not supported by GPU” | GPU driver outdated or card lacks Vulkan support. | Update GPU drivers. If card is pre-2014, Vulkan may not work. | | “Error 0x80070643 – Fatal error during installation” | Corrupted installer or blocked system files. | Run sfc /scannow in admin command prompt, then retry. | | Missing MSVC runtime | Visual C++ Redistributable not present. | Install VC++ 2015-2022 Redist (x64). |
The legitimate file typically resides in C:\Program Files\VulkanRT\ or C:\Program Files (x86)\VulkanRT\ . vulkanrt-1.1.108.0-installer
: Re‑run the VulkanRT installer (as described above). If the problem persists, use a tool like DDU (Display Driver Uninstaller) to completely remove your existing graphics driver and then install the latest driver from your GPU vendor’s website. This will replace the Vulkan runtime files from a clean state. | Error Message | Likely Cause | Solution
Games may be forced to fall back on older, less optimized graphics APIs, leading to significant drops in frame rates and stuttering. | Click More info → Run anyway (only
You do not need to download VulkanRT manually. It bundles automatically with graphics drivers.
Games that rely on the Vulkan API will crash on startup or refuse to launch.