Dear ,György Thék Welcome to Microsoft Community.That sounds incredibly frustrating, especially when everything worked smoothly before.There's no need to worry; I'm here to assist, and we can work together to resolve this issue effectively. Here are some steps you can try to resolve your issue.
Use an Alternative Backup Tool
- If the issue persists, consider using a third-party backup tool like Macrium Reflect or AOMEI Backupper. These tools often provide more flexibility and reliability for creating disk image backups.
. Update Windows
- Go to Settings > Update & Security > Windows Update.
- Check for updates and install any pending ones, as they may include fixes for compatibility issues with legacy tools.
. Reinstall the Backup and Restore Tool
- Open Control Panel > Programs > Turn Windows features on or off.
- Uncheck Windows Backup and Restore, click OK, and restart your computer.
- Re-enable the feature and try again.
Best Regards, Roy Monorov | Microsoft Community Support Specialist