The locale specifies which settings and formats are applicable for the system in terms of the time, language and region. One of the settings is the applicable decimal separator. For example, in the USA, the United Kingdom and China, the period is defined as the decimal separator, while Germany uses a comma. If the setting for the separator does not match the country and language setting for the system, Windows classifies this as an incorrect parameter, which prevents the backup and displays the 0x80070057 message.
All you need to do to solve the problem in this situation is to set the correct option for the decimal separator, which is done as follows:
- Open the Control Panel using the Start menu.
- Select the “Region” category (requires icon view).
- On the “Formats” tab, click “Additional settings”.
- Under “Decimal symbol”, enter a period as the preferred option.
- Click “Apply” and then click “OK” to save the change.
- Restart the computer.