How to set up Klar.gg Lite (Rainbow Six Siege)

Your Klar.gg Lite – Rainbow Six Siege license key was emailed to you the second your payment cleared - it's also waiting in My Account → Orders. This guide takes you from that key to your first launch.

• GameRainbow Six Siege
• PlatformWindows 10 & 11 · Intel/AMD
• DifficultyMedium
• Display modeBorderless (required)

1. Clean your system

• Remove all third-party antivirus (Kaspersky, McAfee, Norton, Bitdefender, etc.).
• Uninstall Riot Vanguard and FACEIT AC completely.
• Disable Windows Defender real-time protection (Windows Security → Virus & threat protection).
• Run R6 in DirectX mode, not Vulkan - Vulkan is unsupported and causes "Target didn't respond".

2. Load Klar first, then the game

Troubleshooting

• VGC.SYS - uninstall Riot Vanguard, or run sc stop vgk in an admin Command Prompt.
• BEDAISY.SYS / EASYANTICHEAT.SYS - you opened the game before Klar - close it, load Klar, then start the game.
• BHDRVS.SYS - uninstall Norton / Symantec.
• I2 error - remove all AV, disable Defender, overlays and Core Isolation → Memory integrity, then reboot. Uninstall FACEIT if it persists.
• VCRUNTIME / MSVCP140.dll missing - install both Visual C++ redistributables (buttons below), then reboot.
• Loader closes at 100% - sync your clock: Settings → Time & language → Date & time → Sync now.
• "Couldn't find key" - copy the key with no surrounding spaces and leave the referral box blank.
• Loader re-updates forever - enable IPv6 on your network adapter, or connect through a VPN (a German endpoint works well).
• Windows Home edition - restart your PC before every injection, or upgrade to Windows Pro to avoid it.

Still stuck?

Our team lives on live chat and Discord 24/7 - open a ticket or start a chat with your order number and a screenshot of any error, and we'll get you playing. Every key carries a replacement guarantee.