How can a virtualiser help secure my computer? I understand that you can basically keep the changes you want and get rid of anything else you dont want including any malware. But surely if you've got other good security products you wont need a virtualiser as nothing will get on. Virtualisers seem like threat gate guards. Are there any other uses? Also what are the major feature differences between Shadow Defender, Returnil Premium and Shadow User. Just out of curiosity they all use ISR technology right? Thanks!