I have Acronis True Image Home 10 installed on my computer which runs under Windows Vista Home Edition. Once every week, I perform a full DISK backup, followed by a daily (scheduled) incremental backup on each of the subsequent 6 days of the week. Initially, these incremental backups run without any problems, but at some point during practically EVERY week, Acronis suddenly refuses to run the incremental backup and displays the following message: "The file you have chosen is not the Acronis True Image backup, or the file is corrupted, or this is not the last volume of multi-volume archive.” However, whenever I then inspect the relevant backup archives, I always find that the initial full backup as well as all the subsequent incremental backups are present, and are all 100% correctly named (with all file names containing the correct incremental numeric suffixes). This state of affairs has led me to the conclusion that some or all of the backup files, although correctly created during previous backup operations, may have subsequently become corrupted To “test” this conclusion, I attempted to perform a restore operation from each of the existing backup archives (including the initial full backup). As expected, Acronis refused to run each and every one of these restore processes and consistently reported the following error: “E0004000D: The file is corrupted. A possible reason may be poor media quality.” The following additional information may be helpful: 1) I back up to a less than 1-year old external Iomega hard drive which has never malfunctioned in any way. I am not aware of any files stored on it having ever become corrupted or unreadable, and I have therefore no reasons to suspect that poor media quality is the cause of the issue in question. 2) The backup files which Acronis deems “corrupted” can still be opened without any difficulties and manually “explored” using Windows Explorer. 3) I also perform daily incremental DATA backups to the same external hard drive, and these operations have never failed. 4) I have run “Error-Checking” (with automatic error correction) on both the external hard drive that I am backing up to and the backed up local hard drive itself (using Properties > Tools > Check now...), yet the backup failures keep recurring. Has anyone experienced similar problems and then managed to discover the cause? Many thanks in advance for any responses.