Hi there... well, I downloaded an ISO file and I burnt it myself. But I tried also with somebody else's copy which was also a downloaded version, and he had used it before, that's why it was strange to me that it didn't work on my laptop. I never tried to install it on the smaller HD, I don't know if it has anything to do with the hd or with the laptop. What remains strange to me, is that I used the same copy in November, and I could work for a month and a half, full throttle editing videos, no crashes whatsoever, till I installed the synchronizer for my palm Tungsten C, then I thought that the two programs couldn't work together, and then my problem began. Maybe something else happened at that time, but that's the only thing I remember.