Origin DA:I wont install

[Tanahradion]

Hi guys, wondering if you could help me with this:

Brought an Origin CD key from CJS CD keys....redeemed code fine, downloaded the files then when coming to install it says "ready to install" I click install, the install bars looks like its loading then after about 2 minutes it stops and goes back to ready to install.

I;ve tried deleting and re-loading but get same issue, I have no idea whats going on or how to solve it. Any ideas??