Failure when installing True image 2015 free version for 30 days

Hello
As I was decided to buy a new version of True image 2015 . to replace my old version True image 2013 not compatible with the future Windows 10 arriving on 29 the july
But before i woul try this version downloadiing the free version for 30 days
Mys system is windws 8.1 and when the installation begins after , about ,80 % the installation stop with : Failure Impossible to finish installation . I do not remenber if it was a code failure .
I tried a second time and it was the same problem .
Fortunaltly i did not paid . if not i would have paid for nothing .

I wanted to install on a jst fresh installed new system windows 8.1 , folowing a hard disk failure
thanks for help
FF
PS : I forget to say that No old version is installed on the new hard disk , the old version remain on old crash hard disk