Early days yet but I have managed to get FD-ISR and DeepFreeze to play together quite happily. Installed FD-ISR - made a snapshot. Installed DeepFreeze to the snapshot. DeepFreeze by itself has always been quicker to boot and reboot than Freeze within FD-ISR and of course FD-ISR makes an ARX file on another partition or drive which is quite large. But I do like having multiple snap shots so I hope they will continue to work together. Only problem is that rebooting from the DeepFreeze snap shot to the Primary requires intervention when F1 appears. Otherwise no change occurs and you boot back to the DeepFreeze frozen snapshot. Eventually I expect I will use DeepFreeze Only on a couple of laptops ( quicker and saves drive space). FD-ISR Freeze only on fast dual core and probably not combine them BUT its bice to know that if needed they will work together happily - all backed up with Acronis or Paragon or Ghost if you must.