I am having trouble booting Acronis TrueImage from a flash drive. I have tried v10 and 2 versions of v11 (including the current version.) My TI11 is a retail copy, with a boot cd. That cd does boot and work correctly. I've used it lots of times. I can boot from the flash drive. I've done it for Linux (Knoppix v5.1.1) and for BartPE. (Yes, I know I can use the BartPE plugin for TI11. I may do that. But I'd like to solve this problem anyway.) But I can't boot TrueImage from the usb flash drive. As soon as the computer tries to boot from the flash drive, I get the following error: Starting Acronis Loader... Acronis Loader fatal error: Boot drive (partition) not found. Press <Enter> to try to boot your OS... There is nothing wrong with my MBR or partition, etc. Vista boots fine. As do Knoppix & BartPE from the USB flash drive, as does the TrueImage cd. I found a web site that says TI sometimes has problems with flash drives and forgets to the boot loader. The site gives four TI images to put onto the drive. Two based on PEtoUSB and two based on Syslinux. Each in 256m and 512m sizes. I tried those and it didn't help. I've tried booting from different usb ports. Didn't help. When making the recovery media, it gives you the chance to enter some command line paramters. Following some web pages advice, I added acpi=off noacpi That didn't help. I'm using a Sandisk 2gig flash drive with the u3 junk removed. My latpop is an Acer 5520-5912 with a geForce 7000M. I'm runing Vista. I'm wondering if maybe it's the hidden emergency recovery partition that is confusing the USB booted version of TI. Acer (like many computer makers), at Microsoft's very strong suggestion, puts a hidden recovery partition onto the drive. This way they don't have to give out a real Vista dvd. That hidden partition is the very first partition, and it has a non-standard partition number type. That hidden partition doesn't confuse Linux, BartPE, or the TI cd. But maybe when TI11 boots from the USB it gets confused? Or maybe that's not even close... Maybe it can't handle the USB hardware properly until it fully boots? But even an old Knoppix can do that. Any ideas?