I have been using Acronis True Image for years without problem and intend to continue to use it as my ultimate safety. Have just bought and installed DeepFreeze which works very well. My only concern is when it comes to making an image of C: with DeepFreeze installed. The book says DeepFreeze must be in a Thawed state - fair enough but then says "set Flag" . I have just made an Acronis system image from within windows with DeepFreeze in thawed mode but did NOT set the flag. Image made no problem and restored no problem. system still working. So does anyone know what all this flag business is about ? Does it really only matter if the image is to be deployed to another machine ? Next test is to install FD-ISR and install Deep Freeze within a snap shot. If it works then image the lot. any thoughts ?