usually indicates...... you do not meet the far cry 4 minimum system requirements
http://blog.ubi.com/far-cry-4-pc-specs/
Far Cry 4 Minimum Requirements
MINIMUM
OS: Windows® 7 (SP1) / Windows® 8 / Windows® 8.1 / (64-bit only)
Processor: 2.6 GHz Intel® Core™ i5-750 or 3.2 GHz AMD Phenom™ II X4 955 <--*note* both are Quad core CPU's
Memory: 4 GB RAM
Graphics: NVIDIA GeForce GTX 460 or AMD Radeon HD5850 (1 GB VRAM)
DirectX: Version 11
Network: Broadband Internet connection
Hard Drive: 30 GB available space
Sound Card: DirectX-compatible
Additional Notes: Windows-compatible keyboard, mouse, optional controller.
RECOMMENDED:
OS: Windows® 7 (SP1) / Windows® 8 / Windows® 8.1 / (64-bit only)
Processor: 2.5 GHz Intel® Core™ i5-2400S or 4.0 GHz AMD FX-8350 or better
Memory: 8 GB RAM
Graphics: NVIDIA GeForce GTX 680 or AMD Radeon R9 290X or better (2 GB VRAM)
DirectX: Version 11
Network: Broadband Internet connection
Hard Drive: 30 GB available space
Sound Card: DirectX-compatible
Additional Notes: Supported video cards at the time of release: NVIDIA GeForce GTX 460 or better, GeForce GTX 700 series; AMD Radeon HD5850 or better, Radeon R9 series.
Note: Laptop versions of these cards may work but are NOT officially supported.