Error 87 minecraft launcher

Question

Error 87 loadlibrary failed parameter incorrect whenever i try to open minecraft launcher Anyone?

Answer 1

Hi,

In this case, the problem might be with the video driver. Have you updated your video driver to the latest version?

Which version are you trying to start, Bedrock or Java?

Thanks

Answer 2

Error 87 with a LoadLibrary failure indicates that Windows is trying to load a DLL in a way that is not valid for the current process (for example, a 32‑bit vs 64‑bit mismatch or an incompatible binary), similar to the scenario described for R/Revolution Analytics.

In that documented case, the fix is to avoid loading the incompatible architecture by installing or running the component in a single architecture mode instead of multi‑architecture mode:

R CMD INSTALL –no-multiarch <package_name>.tar.gz

For Minecraft Launcher on Windows 11, the equivalent practical steps are:

1. Uninstall any existing Minecraft Launcher installations (both from Settings → Apps and from any legacy/old launchers).
2. Make sure only the correct architecture of the launcher is installed (from Microsoft Store or the official installer for the OS). Avoid mixing 32‑bit and 64‑bit components.
3. If any third‑party tools or custom launchers are involved, remove them and test only with the official launcher to ensure only matching binaries are loaded.
4. After reinstalling, restart Windows and try launching Minecraft again.

If the error persists, collect logs and crash details and contact support with the exact error text and environment details, as the underlying cause is the same class of LoadLibrary/architecture incompatibility shown in the referenced article.

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References:

• ERROR: LoadLibrary failure: %1 is not a valid Win32 application.