CONCRT140.dll Missing or Not Found
What is this error?
The Concurrency Runtime DLL from Visual C++ 2015-2022 is missing. Part of the same runtime package as VCRUNTIME140.dll.
Common causes
- Visual C++ 2015-2022 Redistributable not installed
- corrupted runtime installation
- antivirus quarantine
- partial Visual C++ update
How to fix it
- Install Visual C++ Redistributable 2015-2022 (both x86 and x64)
- repair existing installation
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
"CONCRT140.dll was not found" means the Visual C++ Concurrency Runtime is missing. This DLL handles multi-threaded operations in games and is part of the Visual C++ 2015-2022 runtime package.
This affects any game or application that uses multi-threaded C++ code, which includes most modern games.
How to fix it:
- Download and install the Visual C++ Redistributable 2015-2022 from Microsoft — install BOTH x86 and x64 versions
- If already installed, repair it: Settings > Apps > find Visual C++ 2015-2022 > Modify > Repair
- If repair fails, uninstall all Visual C++ Redistributables, restart your PC, then install them fresh
- Check your antivirus quarantine for the DLL file
- Run 'sfc /scannow' in an admin Command Prompt
- Verify the game's file integrity through your launcher
- Never download individual DLL files from untrusted websites — always install the full Microsoft runtime package
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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