This is what I did and it fixt the problem. 🙂

Open the winsxs folder (Start, Run, winsxs).
Delete the folder named x86_Microsoft.Windows.Networking.RtcDll_6595b64144ccf1df_5.2.2.1_ or a file similar to this name.
Restart the installation; the problem should be solved.
Let me know if it works for you guys.