thanks for the error message… why ever you post not in your own thread 
question:
crashed during installation (downloading files)
what does it mean. Former you wrote you had a running game already. Now you mentioned ctd while download…
0xc0000005
is unfortunately a common error and topics like Crash to desktop without error message - #4387 by ThewyClock374 mention lot of possible reasons.
Can you also share some basic infos about your system specs ?
( because you ignored the issue template , we have to ask for all necessary info again… which is not so nice )
In case you own 16GIG RAM, please check your windows pagefile setting first.
I also assume that you have no mods installed.