The error code 2869 usually indicates a problem with the installation package and could be due to various reasons. I would recommend trying the following steps to resolve the issue:
- Run the installer as an administrator.
- Ensure that the installation package is compatible with your version of Windows.
- Check if any antivirus or security software is causing conflicts during installation.
If the problem persists, it might be helpful to contact the support team or the developers of the "INSA Tsere-Dulla" program for further assistance.