Problem signature:  Problem Event Name:	APPCRASH  Application Name:	FalloutNVLauncher.exe  Application Version:	1.2.14.0  Application Timestamp:	4d5f0be3  Fault Module Name:	GameOverlayRenderer.dll  Fault Module Version:	1.8.75.94  Fault Module Timestamp:	4dcb1ea5  Exception Code:	c0000005  Exception Offset:	00013583  OS Version:	6.1.7601.2.1.0.768.3  Locale ID:	3081  Additional Information 1:	0a9e  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789  Additional Information 3:	0a9e  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789Read our privacy statement online:  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409If the online privacy statement is not available, please read our privacy statement offline:  C:\Windows\system32\en-US\erofflps.txt

I occasionally (Not always!) experience this crash shortly after the game launcher opens.

Gameoverlay is steams in game menu that you can bring up in game (alt-tab). Other overlays that also hook fallout nv can cause conflictions.
The overlay can be disabled in steam through the library properties. Disable steam in game community checkbox(something like that).
Disabling it will make NVSE not work if you use mods.

Some steam info:
https://support.steampowered.com/kb_article.php?ref=5774-UXVB-5193

Check out interfering programs

The file that fails to verify should be safe to ignore. Check your steam directory for a file called gamevalidation.log. The file should be installvbscript?? something like that.
My copy fails on this file and it seems to be a common issue. I believe there is a "fix" for it too. I never bothered.

Yep i know what the DLL is responsible for. I just thought I'd bring this to the developers attention. When it works, it works for the whole game session, when it doesn't work it crashes very shortly after the launcher opens. Essentially the chances of it corrupting your save games is non existent and the fact that it doesn't always happen, makes it a pretty minimal issue to worry about.