"Unexpected Client Behavior Detected" - This error kicks you from games when Roblox's anti-cheat detects something suspicious. Here's how to fix it legitimately.
Error Code 268 appears when Roblox's anti-cheat system (Hyperion/Byfron) detects behavior that looks suspicious. This doesn't always mean you're cheating - legitimate software can trigger false positives too.
Common triggers include: Discord overlay, OBS Game Capture, FPS monitoring software, certain antivirus programs, screen recording tools, and leftover files from previously installed programs. Windows 10 and Windows 11 users are equally affected.
Important: If you're using actual game exploits or injectors, Error 268 is working as intended. Remove all such software completely to play legitimately.
Looking for a Roblox Error 268 fix? The most common cause is overlay software like Discord, NVIDIA GeForce Experience, or MSI Afterburner running in the background. Closing these programs before launching Roblox resolves the issue for most users.
This "Unexpected Client Behavior" error typically occurs when third-party software modifies game memory or injects code into Roblox processes. Even legitimate programs like screen recorders and performance monitors can trigger this anti-cheat detection. Always use official software from trusted sources to avoid false positives.
Overlay programs that inject into games often trigger Error 268. Close them completely before launching Roblox.
Programs to close:
• Discord (disable Game Overlay in settings)
• GeForce Experience Overlay
• Xbox Game Bar (Win + G to disable)
• MSI Afterburner / RivaTuner
• FRAPS, Bandicam, OBS (close completely)
Any software that modifies Roblox behavior will trigger Error 268. This includes script injectors, exploits, and FPS unlockers (except Bloxstrap which is safe).
1. Uninstall any Roblox-related tools from Settings > Apps
2. Check %appdata% for leftover folders
3. Check %localappdata% for suspicious folders
4. Use Revo Uninstaller to remove leftovers
Corrupted or flagged cache files can cause persistent Error 268 even after removing problematic software.
1. Close Roblox completely
2. Press Win + R, type: %localappdata%
3. Delete the entire Roblox folder
4. Also delete from %temp%
5. Restart your computer
Some antivirus programs inject monitoring code into processes, which triggers Roblox's anti-cheat.
Temporarily disable real-time protection in:
• Windows Defender
• Norton
• McAfee
• Avast/AVG
If this fixes it, add Roblox to your antivirus exclusions list.
See our detailed guide: Firewall & Antivirus Blocking
A clean boot starts Windows with minimal programs, helping identify if background software is causing Error 268.
1. Press Win + R, type: msconfig
2. Go to Services tab
3. Check "Hide all Microsoft services"
4. Click "Disable all"
5. Go to Startup tab > Open Task Manager
6. Disable all startup items
7. Restart and test Roblox
A fresh installation ensures no corrupted or flagged files remain.
1. Uninstall Roblox from Settings > Apps
2. Delete %localappdata%\Roblox
3. Delete %appdata%\Roblox (if exists)
4. Restart computer
5. Download fresh from roblox.com
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