"Restore Failed. This is an Invalid Format of a Post QuickBooks 2007 Backup File"
"Error: Restore failed. Can't remove log file"
The file name may also display as *.qbw when attempting to save the restored file.
Intuit recommends more than one solution for this problem. The first solution may solve your problem, or you may need to try all of them to resolve the issue. For best results, perform the solutions in the order shown.
Restoring a backup to and from your local computer is simpler than using a flash drive or network drive. Fewer things can go wrong. Copy your backup to your desktop before restoring it.
Use the QuickBooks File Manager to determine the version of the backup you are attempting to restore.
You can restore a backup to a newer version of QuickBooks, but not to an older one.
Copying a backup to a new folder will make sure it is not in the folder that may be damaged. Using Windows Explorer, you can copy and paste the file into a folder in a different location.
Make sure the file you are trying to restore is an actual backup file.