ps7.0 installation is not on how to do? ? Urgent! Knees and begged solution

Point of installation dialog box appears, but there is no program associated with it means that my computer program anything less??? So how do I do??

Redo program format c disk, if feasible, still does not work is a bit hard problems have previously appeared on my computer, can not be installed, the hard disk can not find.

re-download the other versions