I see, you are stuck in that lovely loop. Try this...
Try turning off your internet before you restart. I know it sounds really odd, but if it is trying to download something, or reinstall something that didn't install correctly the first time, through a download, then it will just keep trying to download over and over, going round and round.
So try turning off either the WiFi or unplug Ethernet (depending on how connected) then restart.
If that doesn't work, try this....
1. Power off the laptop.
2. Power on the laptop.
3. As soon as you see the rotating loading circle, press and hold the Power Button until the computer shuts off.
4. Repeat this process a few times until you see the "Preparing Automatic Repair" screen.
5. Now you want to let the laptop boot to the "Automatic Repair" screen.
6. Click "Advanced Options" and then select "Troubleshoot".
7. Here you want to select "Refresh your PC", if you do not wish to erase data, or "Reset your PC" to erase all data and restore your system.
8. From here just follow the screen instructions until the recovery is completed.