In order to solve the problem, press Alt + Ctrl + Delete key combination, open Task Manager and close all unnecessary applications that may use your Internet bandwidth. After that, navigate to the official web page, select you operating system, click Next and download the files. Also, since the installation package is large, I recommend you use a download manager that will help you to increase the speed. If you still have issues, temporarily disable your security program and Windows Firewall, run a registry cleaner and try again.