It's well known that various factors such as faulty memory and some USB chipsets can cause corrupt images. However, there are always users who report that they just can't get TrueImage to work successfully. In my case ever since I've had TrueImage (version 8 build 786 onwards) I've been consistently getting images which are corrupt. This occurs on one specific computer (I have used on another PC and a laptop without a problem). Very occasionally I get an image which is valid (validates OK on another computer) although the validation fails on this computer. The point during validation at which the validation fails is random. Consequently, I have had to move my hard disk drive to another machine whenever I want to use TrueImage. I have done substantial testing, changed various BIOS versions and BIOS configuration data without any clue to what is causing the issue. Now I believe I may have found a possible cause. I have done some testing which indicates that PCI Latency may be a factor. I have been testing using PCI Latency Tool 3.1 v2 downloaded from http://downloads.guru3d.com/download.php?det=951 I need to do more testing to confirm my suspicions but I'm unlikely to find enough time to do so in the near future. I haven't done any machine code programming for about 30 years (before the PC era) and am not very familiar with the Intel x32 architecture. My questions: What happens if the PCI Latency timer expires during an operation? Can this fact be programmed for and appropriate action taken? What does TrueImage do in this case? Possibly nothing, hence corrupt images and/or validation failure? Anyone like to do some testing? If you don't have a corrupt image problem - can you cause it by adjusting PCI Latency? Note that apparently setting BIOS PCI Latency is not sufficient since not all PCI cards, and particularly AGP graphic cards, actually use this info for latency timing - they just set their own latency. This is where the PCI Latency Tool software is useful - you can set the latency for each piece of hardware. Also note that PCI Express cards do not have latency timers. Does anyone using PCI Express have unexplained corrupt images? I'd be very interested in comments by Acronis.