Windows backup is unable to start error 0x80070057


I'm unable to start Windows backup. It failes with error: 0x80070057

Any solution for this ?

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asked on Super User Aug 10, 2014 by Spacedust • edited Aug 17, 2017 by fixer1234

3 Answers


run cmd as Administrator, type:

reg add HKLM\SOFTWARE\Policies\Microsoft\System /v CopyFileBufferedSynchronousIo /t REG_DWORD /d 0x1 /f


way 2:

run cmd as Administrator, type:

fsutil usn queryjournal C:
fsutil usn deletejournal /D C:


answered on Super User Aug 10, 2014 by STTR • edited Aug 10, 2014 by STTR

Follow both KB Articles from Microsoft, they deal with Backup issues with error

"0x80070057" error message when you back up files in Windows 7

Do the change of the decimal symbol setting in control panel.

To change the decimal symbol setting, follow these steps:

  • Open Control Panel, click Clock, Language, and Region, and then click Region and Language.
  • Click the Formats tab, and then click Additional settings.
  • In the Decimal symbol field, type . (dot), and then click OK two times.
  • Restart the computer.

Restore operation by using Backup and Restore may fail in Windows 7 SP1 or in Windows Server 2008 R2 SP1

answered on Super User Aug 11, 2014 by magicandre1981

Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method.If you are not sure about making changes to registry, get the fix it for me program here.

  1. Click Start button, type Regedit.exe in the Search programs and files box, and then press ENTER.

  2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\System

  3. On the Edit menu, point to New, and then click DWORD Value.

  4. Type CopyFileBufferedSynchronousIo, and then press ENTER.

  5. Right-click CopyFileBufferedSynchronousIo, and then click Modify.

  6. In the Value data box, type 1, and then click OK.

  7. Exit Registry Editor.

answered on Super User Sep 19, 2015 by Nirmal Seneviratne

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