Error+code+++0x81000001+or+0x81000008


 * Error code 0x81000001 or 0x81000008 **
 * How to fix Error code: 0x81000001 or 0x81000008 when using Windows 7’s Backup and Restore.**

Backup and Restore failed and you receive the following error message: Windows Backup did not complete successfully.

The underlying problem is that Windows 7 has an undocumented limitation on the maximum file size that can be backed up. 32-Bit and Windows 7 64-Bit users each have different limitations.


 * If you are using a 64-Bit version:**

Click the Backup and Restore ‘Options’ button and in the ‘Windows Backup Troubleshooting Option’ window click on the ‘Show Details’ button located in the lower left. If you see the Error code: 0x81000001 is listed, then one or more of your data files are larger than 162GB (Video file for example).
 * If you are using a 32-Bit version:**

Click the Backup and Restore ‘Options’ button and in the ‘Windows Backup Troubleshooting Option’ window click on the ‘Show Details’ button located in the lower left. If you see the Error code: 0x81000008 is listed, then one or more of your data files are larger than 152GB (Video file for example While it is uncommon to see a single file of that magnitude, one user reported a video file in excess of 160GB.

The actual file size limitation can vary as user data files are compressed during the backup process. A large data file is actually broken up into multiple compressed zip files that are successively smaller in size. These zip files are contained inside the backup folder on the destination hard drive. The folder can easily be identified as its name is the same as your PC’s ‘Computer name’.



In addition, files that do not compress very well are likely to fail more often when you attempt to create a backup as more zip files are needed to backup the file. For more details on the actual the backup limitations click here.