I'm pretty sure it'll only automatically update drivers if you're using the built in ones and they release a newer version, from what I've seen it won't see your nvidia/ATI video drivers and go "PFFT mine are better" and overwrite them.
Many thanks for your reply dav3. I'm glad to hear that the video drivers are not updated automatically. Sometimes a new driver can break a game, so the gamer must have the option to rollback the driver to a previous version without Windows constantly replacing it with something newer.
On another subject I have read that even if you turn off all the data collection that Microsoft has included in Win10, the OS still phones home. MS have not specified what data it is collecting from people whether they want it or not. I am getting my information from this article below:
http://thehackernews.com/2015/09/windows10-spying.html
Does anyone have more up-to-date/accurate information on the privacy of Win10?