How to fix error 0x80070057 − Windows 10, Windows 8.1., Windows 7 (When trying to back up/restore files)

Sometimes, a simple restart of your computer is all you need in order to fix error 0x80070057. Consider restarting your computer before trying anything else.

If you are unsure how to restart it, the don't know how to restart my device guide should help.

The System File Checker is a utility that can help you fix the potentially corrupt files which might have caused this error code 0x80070057. To run it, follow the steps below:

1. Click on the start menu and type command prompt;
2. Once it appears in the search results, right click on it and select Run as Administrator;
3. In the command prompt type the following command:
   sfc /scannow
   
   
4. Wait for the process to complete.

If you get the 0x80070057 error message, when you try to make a back-up (or restore), you need to create a new registry key in order to solve this problem. To learn how to create and where to include the registry key, follow the steps below:

1. Open regedit by pressing the Windows key + R keys, typing regedit in the run box and pressing Enter.
   
   
2. Follow the path below, by clicking on the folders on the left side of the regedit window:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\SystemCertificates
   
   
3. Right-click SystemCertificates, and click on New -> DWORD (32-bit) value, to create a new key;
   
   
4. Name it CopyFileBufferedSynchronousIo, set the value to 1, and click on OK to save it;
   
   
5. Restart your computer.

According to users, the 0x80070057 error message appeared because a period (a full stop) was not set as a decimal option in Clock, Language, and Region. Follow the steps below to ensure that a period (full-stop) is set as a decimal option:

1. Go to the start menu and type Region;
2. In the Formats tab, click on Additional settings... and type a period "." next to Decimal symbol:
3. Click on Apply and then OK.

One of the ways to fix the 0x80070057 error code is to replace all the corrupted files manually, however, since it is a long (and dangerous) process, or if there are too many files to replace, the DISM command might be the best alternative. DISM stands for Deployment Image & Serving Management, and it can be used to download and restore the (corrupted) system files. To use the DISM command, follow the steps below:

1. Go to the start menu, type command prompt, and once it appears in the search results, right-click on it and select Run as Administrator;
   
   
2. Type the following command and press Enter:
   
   DISM /Online /Cleanup-Image /RestoreHealth
   
   
3. Once the process is completed and if files were replaced, restart the computer;
   
   
4. Open the command prompt as described in the first step, type the following command and press Enter:
   
   sfc /scannow