Rainbow Six Siege X crashing or won’t launch on PC? Ubisoft’s official fixes: requirements, admin rights, file check, drivers, BattlEye, background apps (November 2026)

Rainbow Six Siege X closes at launch, shows a crash message, freezes or stutters on your PC? Here is what Ubisoft, the publisher and developer, tells players in its official help articles, as read on November 11, 2026. TricknFix did not test these steps itself: they are Ubisoft’s instructions, not a guarantee. Ubisoft asks you to try them in the order listed and to test the game after each step.

1. Check the system requirements

• Ubisoft says that if your PC does not meet the requirements, this will most likely be the cause of performance issues, and that it may be unable to provide additional support below the minimum.

• The game’s Steam page lists as minimum: Windows 10 or Windows 11 (64-bit), AMD Ryzen 3 3100 or Intel Core i3-8100, 8 GB RAM, Nvidia GTX 1650 4 GB, AMD RX 5500 XT 4 GB or Intel Arc A380 6 GB, DirectX 12, 65 GB of free space. The game includes BattlEye anti-cheat.

2. Update Windows

• Install all pending Windows updates: Ubisoft notes this also updates network drivers the game may need.

3. Run the game with administrator rights

• Ubisoft says administrator rights give full read and write privileges, which can help with crashes or freezes. To do it once: right-click the game’s desktop icon or its executable in the installation folder > Run as administrator.

• To make it permanent: right-click > Properties > Compatibility tab > tick “Run this program as administrator” > Apply.

4. Verify the game files

• Ubisoft explains that corrupted or missing files can stop the game from updating or running and cause crashes. Use the “Verify files” option of the launcher you play on (Ubisoft Connect or Steam).

• On Steam: Library > right-click Rainbow Six Siege > Properties > Installed Files > Verify integrity of game files.

5. Update your graphics card drivers

• Check your current driver: Start > Run > type DxDiag > Enter > Display tab. Then download the latest driver for your card from the manufacturer’s website (Nvidia, AMD or Intel).

6. Disable background applications and overlays

• Ubisoft says some Microsoft services or third-party programs running in the background can interfere with games. It recommends turning off non-essential programs manually or doing a clean boot of Windows, then re-enabling them one by one to find the culprit.

• Ubisoft also recommends updating your security software and adding the .exe files of both Ubisoft Connect and the game to the exclusions list in Windows Security. If you turn off a firewall or antivirus to test, turn it back on afterwards.

• For display problems (low FPS, flickering), Ubisoft’s graphics guide adds: lower your monitor’s refresh rate to what your PC can sustain, toggle VSync, try another display mode (full screen, windowed, borderless), and disable screen capture and overlay software, even when it is only suspended.

7. Leave BattlEye installed

• Ubisoft states that BattlEye is installed automatically with the game and must be present on your system: if you uninstall it, you will not be able to launch Rainbow Six Siege.

• Error code 0-0x00001001 means the connection with BattlEye was lost: Ubisoft says to restart the game, then follow its connectivity troubleshooting guide if it persists.

• Separate case: Legend Division in Ranked on PC requires the R6 ShieldGuard security features (TPM 2.0, Secure Boot, Memory Integrity). You can check them in game: Play tab > Security Requirements.

8. Still crashing? Report it to Ubisoft

• Contact Ubisoft Support and attach a DxDiag report (Windows+R > DxDiag > Save All Information) and an MSInfo report. Files are added from “My Cases” on the Ubisoft Help site, 10 MB maximum each (compress them as .zip if needed).

• For an in-game bug, Ubisoft has a dedicated Rainbow Six Siege bug reporter: describe the steps that lead to the bug, what you expected, how to reproduce it, any workaround, and add screenshots or videos.

Sources (Ubisoft, read November 11, 2026)

• Troubleshooting technical issues on PC: https://www.ubisoft.com/en-us/help/connectivity-and-performance/article/troubleshooting-technical-issues-on-pc/000061047

• Troubleshooting technical issues in Ubisoft games (updated October 23, 2026): https://www.ubisoft.com/en-us/help/article/000106026

• Preventing software conflicts with Ubisoft games: https://www.ubisoft.com/en-us/help/connectivity-and-performance/article/preventing-software-conflicts-with-ubisoft-games/000061015

• Deactivating background applications on PC: https://www.ubisoft.com/en-us/help/article/000063761

• Running applications with administrator rights: https://www.ubisoft.com/en-us/help/article/000060505

• Troubleshooting graphical issues on PC: https://www.ubisoft.com/en-us/help/article/000102576

• Information about BattlEye anti-cheat: https://www.ubisoft.com/en-us/help/connectivity-and-performance/article/information-about-battleye-anti-cheat/000064020

• Error code 0-0x00001001 in Rainbow Six Siege: https://www.ubisoft.com/en-us/help/rainbow-six-siege/connectivity-and-performance/article/error-code-0-0x00001001-in-rainbow-six-siege/000066027

• Security requirements for Rainbow Six Siege (updated October 30, 2026): https://www.ubisoft.com/en-us/help/rainbow-six-siege/purchases-and-rewards/article/security-requirements-for-rainbow-six-siege/000117272

• Reporting a bug in Rainbow Six Siege: https://www.ubisoft.com/en-us/help/rainbow-six-siege/connectivity-and-performance/article/reporting-a-bug-in-rainbow-six-siege/000062790

• Generating a DirectX Diagnostic report: https://www.ubisoft.com/en-us/help/article/000078583 ; Generating a Microsoft System Information report: https://www.ubisoft.com/en-us/help/article/000078753 ; Submitting files to Ubisoft Support: https://www.ubisoft.com/en-us/help/article/000063176

• Steam store page (system requirements): https://store.steampowered.com/app/359550/