Nostalrius Begins - Quality wow vanilla realm (1.12)

I have problem. I am installing original wow from disc and installer says that i can install 2.3.0 version. i had 2.4.3 wow later on but i deleted it and now want to instal vanilla. i can't install 1.0.0 only 2.3.0

sorry to say this kiddo but installing from disc is just a bit umh unnecessary, you will get the first patch of vanilla then you have to download every patch one by one untill 1.12.1, just get the client from the site (there's a post on getting started here, look at that). Oh and the thing you're talking about is the game trying to patch up to retail, just don't do it by disc...