Event ID 1026 — .NET Runtime Error
What is this error?
A .NET application crashed with an unhandled exception. Event 1026 logs the full exception details for .NET/CLR crashes.
Common causes
- Unity game crash
- mod loader exception (BepInEx, MelonLoader)
- corrupted .NET installation
- .NET version mismatch
- managed code bug
How to fix it
- Check exception details in event
- repair
- NET Framework
- update mod loader
- verify game files
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
Event ID 1026 (Source: .NET Runtime) logs detailed crash information for .NET applications. Many Unity games and mod loaders (BepInEx, MelonLoader, Vortex) use .NET, so this event appears when they crash.
The event description contains the full exception stack trace — this tells you exactly what went wrong.
How to use this for diagnosis:
- Open Event Viewer > Windows Logs > Application, filter by Event ID 1026
- Read the exception details — look for the exception type (NullReferenceException, FileNotFoundException, etc.) and the stack trace
- The stack trace shows which DLL and method crashed — if it's a mod name, that mod is the problem
How to fix it:
- If a mod is in the stack trace, update or remove that specific mod
- Update your mod loader (BepInEx, MelonLoader) to the latest version compatible with your game
- Repair .NET Framework: Windows Features > uncheck .NET Framework > Apply > re-check > Apply
- Install the latest .NET Desktop Runtime from Microsoft (both x64 and x86)
- Verify game files to replace any corrupted managed DLLs
- Run 'sfc /scannow' to repair system-level .NET files
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
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