Help with Update

So on my friend's desktop, he wanted me to update his Windows 8 to Windows 8.1. So we went on the store app and installed.

After all the process, we type the password to the computer and then after loading the desktop, there is a screen saying that there is an error:

BUGCODE_NDIS_ DRIVER. and tells me to look online later. After this message, it has a % that goes up to 100% and restarts my computer. It repeats over and over. What do I do?

This section is only for things related to FGunZ.
We don't provide tech support, at least not that much.
If you are experiencing issues updating from Win 8 to 8.1 > visit a tech shop.