01At a glance
- Symptom
- Missing VCRUNTIME / MSVCP DLL error on launch
- Fix
- Microsoft Visual C++ 2015–2022 x64 runtime
- Source
- Microsoft's official download only
- Arch
- x64 — the x86 runtime does not fix this
02Procedure
Precondition: Meridian installed, launch fails with a missing VCRUNTIME or MSVCP DLL message.
- Open Microsoft's official Visual C++ Redistributable page and download the 2015–2022 x64 (64-bit) installer. The x86 build does not fix a 64-bit launcher.
- Run it, accept the prompt, and reboot if asked. Re-run Windows installer checks only if launch still fails.
- Launch Meridian and confirm About opens. Then continue to Install firmware.
03Rules
- Microsoft's official runtime only. Third-party DLL packs and single-DLL downloads cause version skew and are unsupported.
- One install covers all Meridian builds on the machine; reinstall only after a Windows reset.
- If the error persists after the x64 install, the launcher path is corrupt — reinstall from Download Meridian to the default path.
04Questions
Q.01Which runtime does Meridian need?
Microsoft's official Visual C++ 2015–2022 x64 redistributable. Install the 64-bit build.
Q.02I installed a runtime but it still fails?
You likely installed x86. Install x64, reboot if asked, and re-launch.
Q.03Can I copy a single missing DLL?
No. Single-DLL copies cause version skew. Use Microsoft's official installer.