I Have just got the game today, opened the box to see 3 dvd inside. i put the first disc in, let it autostart. After about 3 minutes i entered the cd key, it accepted the key and then starting downloading. It didnt ask for the next disc, to my surpise it started a 22gb download.

why does it need to download that much info when there is 3 install disc ?

i am running window 7 x64

https://support.steampowered.com/kb_article.php?ref=5357-FSQM-0382