A simple question from a stupid person, does the loading end if i turn my computer off? It says that i can close the window but leave Steam running and check it later. I just want to be sure that it does not start the download from the scratch again when i restart my computer. Thank you for your time.

It'll pick up where you left off. Assuming you didn't do a sudden power down and steam closed properly.

Hmm, i think that just selecting 'exit' from the steam thingie in the lower right corner is enough. Thanks for the response.