Here's a twist: I made a full backup of my PC in October and 3 Differential backups since then to my external USB 250GB hard drive. When I went to recover from a HDD failure that happened today, Acronis applicaiton that I booted from the factory paid-for CD said that some of my differential files (including the latest one I needed) was not a TI archive or currupt. So I copied the latest differential file to a new file in the same directory, and magically it recognized it ok. So I started the restore from the bootable CD, and then is said I needed to put the disk in that had volume 1. Well, volume 1 is the original backup from what I can tell and that file was right there and working great. To be safe I tried to fix the other differential backup archives with the same copying method, and in the end, none of my differential backups are considered proper archive files now. Don't ask me why. I have 2 other laptops that I tried to work with these files. No luck. I copied them to their internal hard drives and nothing better. So it's not the USB hard drive issue. I then did an upgrade from build 2.323 to 3.854 and that made no difference at all. A lot of people saying that fixed their problems, but no luck for me. I even created a new bootable CD from the new version and it didn't help (I was hoping at least that the new build would eliminate the random hanging of this buggy application when booting from the CD, but no....) I don't see this as a memory issue, and I am really hoping I don't get that run around from support. Otherwise, why are my full backups ok and differential are bad? And why would copying one of them around fix it temporarily? I really need to get this solved. This is the worst feeling in the world having what is suppose to be a safety net just flat out failing to do the job. I purposely have 2 HDD's so that I can recover fast along with the external 250GB hard drive and a paid verson of Acronis. How could the software leave me flat like this?