You don't have to unpack anything yourself. After download, it should get installed right away unless you selected the "install later" option (if there is any, not sure). After the download has completed, it will do its thing by itself and it will restart your PC 3 to 4 times during installation.
1Mbps is 25x slower than mine, so yeah, expect it to finish after almost 2 days. Looking at your progress, it's right on track with your internet speed.