According to the v1.4 Patch Notes from the Steam Community, the update focused on:
Improves performance and reduces "stuttering" during high-speed driving or combat sequences. sleeping dogs v14 fix
Still stuck? Follow this step-by-step diagnostic (the "Sleeping Dogs v14 fix" flowchart): According to the v1
Windows 10 and 11 handle full-screen optimizations in a way that breaks Sleeping Dogs v14. Right-click . Select Properties > Compatibility . Check "Disable full-screen optimizations." Check "Run this program as an administrator." Set compatibility mode to Windows 7 . Troubleshooting Persistent Crashes Disable Steam Overlay sleeping dogs v14 fix