Crashes when launching

When I launch Fortnite appears the UE4 Crash reporter telling me “An Unreal process has crashed”.
My drivers are updated.
It is an ASUS X53S with 8GB of RAM, 8 core I7 and with NVIDIA GEFORCE GT540M - CUDA 2GB.
It started crashing yesterday, maybe when I updated Windows 10.

This are the “summary information”:

You do not have any debugging symbols required to display the callstack for this crash

These are the Logs:

link text

link text

Thank you very much.
Pierfrancesco B.