I use the pay version and like it. Make sure you make the rescue disk. I have my HD partitioned system and programs on one and the data on the other. You can restore the system in less that 15 min and it doesn't affect your data. I use CD to boot from to make a system image. Booting from disk runs it from a little Linux program, it doesn't install anything. That way you are free of anti virus or anything running in background from causing problems.