patch · February 6, 2025

Rainbow Six Siege Patch Y9S4.3 Cuts PC Boot Times in Half

The latest Rainbow Six Siege patch trims unnecessary executable reboots on PC to drastically accelerate launch times. The update also resolves a persistent bug affecting squad matchmaking settings.

Ubisoft has released patch Y9S4.3 for Rainbow Six Siege, delivering a major quality-of-life upgrade for PC players alongside a targeted bug fix for squad menus.

Streamlined PC Launch

On PC, the game no longer performs unnecessary reboots of RainbowSix.exe due to BattlEye relaunches. This optimization cuts overall boot time down by roughly 50%, getting players into matches much faster.

Squad Menu Fixes

A bug that prevented squad menu matchmaking settings from saving properly after a game reboot has been resolved, ensuring custom preferences persist across sessions.

Why this patch matters

Patch Y9S4.3 is a lean, impactful update that solves a frustrating PC bottleneck and a persistent settings bug.