: Once installed, you should see "Version 1.4.0" displayed in the bottom-left corner of the main game menu.

If Patch 1.4.0 doesn't solve your "Not Launching" issues, try these common community-verified steps:

: Stuttering and mouse acceleration issues were not included in this hotfix and were targeted for later updates, such as Patch 1.5.0 and beyond. Pro-Tip: Manual Fixes for Persistent Crashes

: Fixed an issue where the game would fail to start if certain USB peripherals (like controllers, flight sticks, or specific keyboards) were plugged into the PC.

: This patch does not fix the flickering or black shadow issues experienced by players using NVIDIA SLI setups; Ubisoft noted this required further collaboration with NVIDIA.