If the installation process stalls, the issue might be that your Windows installer starts a 2. installation before the first is done and that way blocks for the first to finish. Try to install it again and see if a second installer window pops up again. If so, go into your task manager (right-click any open space on your taskbar and choose “Task Manager” or click Ctrl + Shift + Esc ) and click on the windows installer running highest on the list/ using the least MB of memory, and then on "end task". That should allow the 1. installation to finish within seconds.