To fix the blue screen error when using the Realtek High Definition Audio Driver on Windows 7, you can try the following steps:
- Update the driver to the latest version available from the Realtek website.
- Uninstall the current driver and then reinstall it.
- Run a system scan to check for any malware or viruses that might be causing the issue.
- Check for any conflicting drivers and disable or update them.
- If the issue persists, you may need to seek further assistance from Realtek support or a technical expert.