The two possible causes are: there are four primary partitions; the file system is corrupt
List of what may affect the backup speed in Acronis True Image and how to troubleshoot it
User account under which you are trying to run the scheduled task may not have enough rights to do the task
Table of operating systems supported by older Acronis products
Recreate the scheduled task to solve the issue
It is possible to restore a disk image to a larger or smaller hard drive with automatic or manual resize
List of limitations for trial versions of Acronis products
To resolve the issue, remove the "My Web Sites on MSN" folder from "My Computer" in Windows Vista or from "My Network Places" in Windows XP
Incremental or differential backups are larger when performed after disk defragmentation or full restore
Using Acronis True Image, you can transfer a system from IDE to SATA hard disk and vice versa