While working on QuickBooks Software, users may face QuickBooks won’t restore backup error. This error takes place when the user is unable to restore the backup. You may see one of the following messages when this error appears – Error: Failed, QuickBooks Restore Failed– This is an invalid format of a post QB 2007 backup file, or Error: Restore failed – Cannot remove log file. It may be the case that the name of the file gets displayed as *.qbw when you are trying to save the restored file. When does QuickBooks won’t restore backup error occur? A QuickBooks user can get this error when he or she is trying to restore QuickBooks backup under the following conditions – The name of the QuickBooks company file consists of special characters. A QB user is attempting to restore the backup over an existing QB company file. The backup from a pen drive was restored to a network drive (QuickBooks Error 6189 816).