Hello,
Event Name: CLR20r3 is usually associated with. NET Framework.
You can try the following steps to troubleshoot the problem:
- Check to install the latest patches and updates in Windows Update, especially with. NET Framework related updates.
- Check and repair system files:
Open the command prompt (administrator) and run this command: sfc /scannow
Restart your computer when finished.
- The user starts the.NET application. However, if the user.config file is corrupted, the application crashes at startup.
You can delete the user.config file and let the application recreate it. This file is usually located in the following folders:
... \Documents and Settings<user>\Local Settings\Application Data<application_name>... \user.config
Reference:.NET applications crash at startup - .NET Framework | Microsoft Learn
Best regards
Jacen
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