Comodo Time Machine, does the same sort of thing as Roll-Back Rx or Ay Recovery. I.e. Creates snapshots of your system which you can go back to if you delete something or install something you don`t like. Then your system is back to how it was when the snap-shot was taken.
Doesn`t work with RAID or even if you just have a RAID controller but don`t use it
Also has some issues with imaging software, messes with the mbr
http://www.comodo.com/home/data-stor...a-recovery.php
Forgot to say it`s free