Save any error and check whether the game stops in Ubisoft Connect, Steam, BattlEye, or after a window appears. Check Rainbow Six Siege status and current PC requirements, restart Windows, update the launcher and game, then verify the installed files. Close overlays and hardware tools for one test. Follow the BattlEye article only when the launch message names BattlEye.
Note whether Ubisoft Connect or Steam never starts the game, a BattlEye window shows an error, or the game window opens and closes. Save the complete message and time.
2
Check status and requirements
Check Ubisoft's live status, then compare the PC with the current Windows, DirectX, memory, graphics, and storage requirements. Wait for an outage. If the PC is below the requirements, it may need a hardware upgrade rather than repeated reinstalls.
Exit Ubisoft Connect and Steam, restart Windows, then install current game, launcher, Windows, and graphics-driver updates. Open the launcher normally after the restart.
4
Verify the game files
In Ubisoft Connect, open Rainbow Six Siege Properties and use Verify files. In Steam, open Library > Rainbow Six Siege > Properties > Installed Files > Verify integrity of game files. Let the repair finish before launching.
Close overlays, screen recorders, hardware monitors, RGB tools, and overclocking utilities for one launch. Keep Windows Security enabled. If the game opens, restore optional tools one at a time.
6
Use the BattlEye path only when named
If the message names BattlEye, compare the exact text with Ubisoft's BattlEye FAQ. Verify files and update the launcher and drivers first. Do not uninstall BattlEye and expect the game to run without it.
If the game still will not open, send Ubisoft the error, point of failure, launcher, Windows version, PC hardware, driver version, and file-verification result.
