I don't have any clues 
On one of my Windows 7 HP 64-bit laptops, every time I installed Debut the whole system froze up, all I could do was power off at the button. I lost count of how many times I uninstalled it with Revo and reinstalled, always with the same result. This went on for months, then one day it just worked! The only changes to my system during that time were Windows updates.