Error code -6/-8 when i try to install Horizon

When i run the Horizon installer i alwais get this error -8 or sometime -6 but its same thing in the message. It say ‘‘Unable to run the Installer. Please download your product again.’’ its the third time i download it and it still say that. Can someone help me ?

Delete\uninstall anything you’ve downloaded\installed thus far.

Download Horizon from here:

With this link i get Error 5: acess denied.