mydll.wang Official Windows DLL Repair Guides
Home  /  Error Codes  /  0xc0000135
.NET related

0xc0000135

The application was unable to start correctly (0xc0000135)

Usually means .NET Framework is missing or corrupted

Root cause

The required .NET Framework version is not installed. Windows 7 ships with 3.5, Windows 10/11 ship with 4.x. If your program needs 3.5 and you are on Windows 10, you must enable it separately.

Fix paths (try in order)

  1. Enable .NET Framework 3.5 via Windows Features

    Control Panel β†’ Programs and Features β†’ Turn Windows features on or off β†’ check "Microsoft .NET Framework 3.5". Windows will download it via Windows Update.

  2. Install the latest .NET Framework

    Download the .NET Framework 4.8 offline installer from dotnet.microsoft.com/download/dotnet-framework.

  3. For modern apps, install the matching .NET Runtime

    .NET 5/6/7/8/9 is a separate runtime. Download the matching version from dotnet.microsoft.com/download.

  4. Run System File Checker

    Open PowerShell or Command Prompt as Administrator and run these commands in order:

    sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

Commonly related DLLs

mscoree.dll .NET Framework
⚠ What NOT to do: Don't grab a DLL from a random download site and drop it into System32. That's the #1 source of "entry point not found" follow-up errors and introduces malware risk.

← Back to error code index