Fix 0x80070057 Error using Back Up Files in Windows 7

Windows 7 has built-in backup utility that can backup the files and folders along with system settings. But if something is wrong, the backup will refuse to run leading to incomplete backup, which follows with 0x80070057 failure error message. The exact error message seen is :

“An internal error has occurred: The parameter is incorrect: (0x80070057)”

According to Microsoft KBA982736, the problem occurs when decimal symbol is not set to ‘.’ (dot). This is common in languages and locales other than English (United States), such as German (Germany). To fix this problem, follow these steps:

1. Click “Start”—> Control Panel

2. Set the view by as “Category”. Then click on “Clock, Language, and Region.


3. In the “Clock, Language, and Region” settings page, click on “Region and Language”


4. In the “Formats” tab, click on “Additional Settings” button.


5. In “Decimal symbol” section, enter . (dot) as shown in screen-shot below.


6. Click “OK” and save all open dialog boxes.

7. Restart PC

The problem arises due to some third-party programs changing the decimal settings.

That’s it. Windows 7 backup should now run smoothly.

Kiran Kumar

Hi there! Kiran Kumar is an Engineer by profession, and loves blogging primarily on Microsoft Windows operating system and also enjoys reviewing software and products. Currently, he is exploring Windows 10 and you will see a lot of articles on know-how about it. When he is not writing for TWP, he enjoys time with his Family, listens to lot of music, enjoys Biking, and occasionally plays racing games on Xbox One.

  • Harold Begley

    Appreciate the link you sent to me, will visit your blog often thanks.

  • Lasse

    Typical of Microsoft, they just can’t learn that the world contains more than US7ASCII.
    Why not fix the bug instead?