I have True Image 2011 with Plus Pack. I have a Dell Optiplex 320 with 2 GB of memory on Windows 7 Pro. Recently, I installed ESET Smart Security 4, which I like a lot. However... The first time after installing ESET that I tried to back up...to a WD Element external USB drive...the backup appeared to go OK, but the validation failed, claiming that the archive was corrupted. I later confirmed, with a test restore to an extra hard drive, that the archive was corrupted. I tested the memory on the PC, having read somewhere that memory problems can cause this error, but the memory tests squeaky clean. One thing that did work was to do the backup to another hard drive on the PC, but having the backup go to an external drive is rather important. I tried upgrading my memory, but I have this really quircky PC...the graphics card apparently keeps me from expanding to more than 2 GB. I have never heard of such a crazy thing. Anyway, I finally tried shutting down the Internet connection and uninstalling ESET and then the backup and validation ran fine to the external USB drive. I normally have the Firewall in Automatic Mode, but put it in Learn mode so that everything would be allowed and I still got the same error in Acronis True Image. Any ideas on how I could make ESET and Acronis co-exist?