Does your computer at least meet Adobe's MINimum requirements? http://www.adobe.com/products/premiere/tech-specs.html
What error message(s) do you see?
Since this is a user to user forum, you may need to contact Adobe directly
Adobe contact information - http://helpx.adobe.com/contact.html
Help for Download & Install & Setup & Activation
Next link has a "Chat Now" button near the bottom