Difficulty installing patch 1.2

[Ihatemyusername]

I want to download Darthmod for Medieval 2 Total War, as I enjoyed it immensely in RTW.

To do this, I need to patch my game to 1.2, but when I try to install it, this comes up:

http://vvcap.net/db/8S9U8K0A0rP_VDKm9pnn.htp

Any help?

[irishron]

If Vista, Win7/8, disable the UAC and logged in as Administrator.

[Ihatemyusername]

If Vista, Win7/8, disable the UAC and logged in as Administrator.

I'm on windows 8 and I'm kind of computer illiterate haha. How do you disable the UAC?

Thanks for your help

[Ihatemyusername]

Nevermind, I've disabled it and I am logged in as admin, yet the same message pops up :/