Are you facing an issue, where when you try to restore or backup files using the Backup and Restore service via Control Panel, on a computer that is running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 Service Pack 1 (SP1)? If so this article may interest you.
This situation could probably arise if your dive is corupt. When such a restore operation fails, you could get the following error message:
System Restore did not complete successfully. Your computer’s system files and settings were not changed. An unspecified error occurred during System Restore. (0x80070057).
In such a situation you might want to download and install a hotfix from Microsoft.
You will have to viist KB2569601 and request the Fix374032.