Pixhawk PSP not installing correctly

Im currently developing a Final Grade Project involving a PX4 quad, and I´m having issues installing the Pixhawk PSP environment.

Tried at first the 2015a version, but at the stage where i must download and compile ("make archives" comand at the console) it freezes, and displays a message saying "exporting NuttX for aerocore..." and there it stays

Afterwards i decided to try some luck on the new 2015b version, but it turned even worse: i execute the "Pixhawk-R2015b_v1.3.1_win64-Install.exe" and the install window never pops up (but keeps running in the backround until i shut down, cannot terminate it)

So i would appreciate if someone with the same problem or with some knowledge on the problem could help me with this issue.

Edit: tried with 2014b version for PSP, still got the same error message as 2015a version.