DirectX 10/11 games crash in fullscreen mode

Recently (something like 1 month ago), all my DirectX 10/11 games started crashing whenever set to launch in fullscreen mode.

My system specs:

OS: Windows 8.1 x64
CPU: Intel Core i5-3230M @ 2.66 GHz (dual core with hyperthreading)
RAM: 4 GB DDR3 @ 800 MHz
GPU: Nvidia Optimus with Intel HD4000 and Nvidia GeForce GT 740M
DxDiag file (just in case): http://pastebin.com/1R2UFhy7

Note: Optimus GPU selection was switched from "Autodetect" to "NVIDIA High performance GPU" (rough translation from French).

Examples of affected games:

AKIBA'S TRIP: Undead & Undressed
Devil May Cry 4 Special Edition
Killing Floor 2

Thanks in advance for your answer(s)

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Why does my game crash when I go fullscreen?

Some games may crash when you play them in full screen mode if the display settings are not set up correctly. To resolve your concern, you may perform the following solutions on your computer: Solution 1. Set the display scaling to 100%.

Why does my Windows 10 keep crashing when I play games?

Your \u201ccomputer crashes when playing games\u201d issue may also be caused by system file corruption. You can run System File Checker and see if there're any system files missing or corrupted. If there are any, the sfc /scannow command (System File Checker) will repair them.

Why does my games keep crashing?

Why do apps freeze or crash? There can be multiple reasons why apps to freeze or crash, especially when you consider the wide range of chipsets, screen resolutions, custom skins on Android smartphones. One reason could be low memory or a weak chipset. Apps can also crash if they are not coded properly.

How do I stop my computer from crashing when I play games?

10. That PC Game Keeps Crashing Because of Your Antivirus Software

Reduce the level of (or disable) file scanning when gaming.

Change your security software for one with a "game mode"

For the duration of your gaming session, disable the software (if possible \u2013 antivirus software recognizes this action as malware)

Fix Games Not Running in Full Screen Mode Issue on Windows 10/8/7

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Kammeran Gonzalez-Keola, Lindeboom Jean-Bapt, Kevin Bidwell, Kammeran Gonzalez-Keola