Problem Symptom:

Consider the following scenario:

* You use the Windows Backup utility to perform a backup on a computer that is running Windows 7. The backed up files are saved on a hard disk drive.
* You use the Windows Backup utility again to perform a backup for a group of files that are larger than the first group of backed up files.

In this scenario, the backup process requires significantly more time than the backup process for the first group of backed up files.

For example, the backup process requires 2 hours for 100 gigabytes (GB) of files and 16 hours for 400 GB of files.

Solution:

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article.