Elements 15

I get this message on screen, when install elements 15:

"installer has detected that a machine restart may be pending. It is recommendet that you quit the installer, restart your machine and installing again"

I do so.. But same message coming up.

insted of quit, i ignore and starting anstalling.

During the installing, after about 10 min. its stopp and its show 74% installed, and a timer goes from 17 min and up. I let the macine stay on in about 2 hours, but it will still not going longer than 74%, but the timer showing now 38 min

(sorry about my english writing is not perfect...):)