λ DLL Errors
d3dx11_43.dll is missing — How to fix it on Windows 11 (2026)
If Windows shows you "d3dx11_43.dll is missing from your computer" when you launch programs like Borderlands 2, Civilization V, the file d3dx11_43.dll is part of the DirectX End-User Runtime (June 2010) and is almost always fixed by reinstalling that package. This guide walks you through the safe fixes — in the right order.
- Time
- 10 min
- Difficulty
- easy
- Applies to
- Windows 11, Windows 10
- Updated
- May 25, 2026
Error message
The program can't start because d3dx11_43.dll is missing from your computer. Try reinstalling the program to fix this problem.
Symptoms
- ▸Error popup: "The program can't start because d3dx11_43.dll is missing from your computer. Try reinstall…"
- ▸Borderlands 2 refuses to launch and immediately closes
- ▸Event Viewer logs "Faulting module name: d3dx11_43.dll"
- ▸Reinstalling the program does not fix the error on its own
Likely causes
- ▸The DirectX End-User Runtime (June 2010) is not installed (or only one architecture is)
- ▸A recent Windows update or program installer corrupted d3dx11_43.dll
- ▸Antivirus quarantined d3dx11_43.dll as a false positive
- ▸An older program installed an obsolete copy of d3dx11_43.dll into its folder
How to fix it — step by step
- 01
Reinstall the DirectX End-User Runtime (June 2010)
d3dx11_43.dll ships with the DirectX End-User Runtime (June 2010) from Microsoft. Uninstall any existing copy from
Settings → Apps, then download the latest x64 and x86 installers from the official Microsoft site (link) and install both. Most d3dx11_43.dll errors stop here. - 02
Run System File Checker
Open PowerShell as Administrator and run the command below. SFC verifies and repairs protected Windows files, including most system-provided DLLs.
sfc /scannow - 03
Repair the Windows component store with DISM
If SFC reports unrepairable files, repair the underlying Windows image first, then re-run SFC.
DISM /Online /Cleanup-Image /RestoreHealth - 04
Reinstall the program that throws the error
If the error appears only when launching programs like Borderlands 2, Civilization V, that program installed its own copy of d3dx11_43.dll into its install folder. Uninstall it through
Settings → Apps, restart Windows, then reinstall from the official source. - 05
Check for malware
Malware often masquerades as a missing DLL. Run a full scan with Windows Defender (
Windows Security → Virus & threat protection → Scan options → Full scan) before downloading any DLL from a third-party site. - 06
Last resort: restore d3dx11_43.dll from a clean Windows install
If every other step failed, copy d3dx11_43.dll from
C:\Windows\System32\on another Windows 11 PC of the same architecture (x64 to x64) and the same build. Never download standalone DLLs from "DLL repositories" — they are the #1 vector for adware on Windows.