Hello! I need to know something regarding the logic that ATI uses with regards to full backups, and Incrementals / Differentials. First, some background on my backup strategy: Currently, I have automated only the backups of my C partition. I have numerous other partitions, but due to the amount of space (approaching a terabyte) plus the low rate of updates, I have decided to not back them up with an automatic task. I currently back up the C partition with a FULL image once per month. Subsequently, once per week, I take an Incremental image. In addition to the backups, I also take a FULL "System State" image once per week and a Differential "System State" image once per day on all the other days. On occasion, I take an extra "stand alone" backup, to be kept for a few weeks or a few months. Like if I'm going to upgrade a major application. The special backup would usually be either a "FULL" image and possibly a second one of the System State, and would be a manual backup of my C partition and one of my application partitions. I would usually name the TIB file something descriptive; for example: "C and D partition Full Image - pre-Office 2007 Upgrade.TIB" ..or.. "C and K partition Full System State - post Open Office Re install.TIB" My question: When I take my "special" image (prior to installing or upgrading a major application), could I be causing the "update" flag for various files to be reset, therefore inadvertently interfering with the accuracy of my normally-scheduled incremental or differential images of my C partition? If so, then I think I would need to run my normally-scheduled full image tasks right after I take my "special" backups; or at least before my next regularly-scheduled Incremental / Differential backup. Okay, that was a really convoluted way to ask a simple question. Sorry! But your advice is appreciated; thanks in advance! Additional Info: This probably won't affect the answer, but I use Acronis True Image 11, Build 8,053.