I can not guarantee the results but some tips that may help.
move your installed games to another drive then other then the system drive;
in steam select move installed games to another drive/steam folder.
Set the ms store for manual download, same for windows update.
Uncheck load steam on pc start.
set antivirus for manual updates.
this goes for any other program that wants to get first crack at the pc when it boots; including flash player and sun java.
update your gpu's and any other system devices and drivers.
Been a steam user for a few years, from vista and up to win10 and win10 makes me have to work much harder to get things running and stable on each new os update.
I would also check the event viewer at the time of these crashes as most often, I have found other things triggering just before or after.