Quick Answer
lifesize.exe is safe. It's Lifesize's official desktop client for video conferences, handling UI, signaling, and media streams across multiple threads for stability.
Is it a Virus?
✔ NO - Safe
Must be in C:\\Program Files\\Lifesize\\Lifesize.exe or C:\\Program Files (x86)\\Lifesize\\Lifesize.exe
Warning
Multiple components may spawn
Lifesize creates multiple child processes for signaling, media, and UI. If you see unusual network activity, verify signature.
Can I Disable?
✔ YES
Close Lifesize from the system tray or end the lifesize.exe process in Task Manager; disabling startup is optional if you don’t need the app running continuously.
What is lifesize.exe?
lifesize.exe is the main executable for the Lifesize Desktop Client. It launches the video conferencing UI, manages signaling with the Lifesize service, and coordinates audio/video capture and playback. The process spawns multiple child processes for rendering, network I/O, and plugins, enabling smooth conference sessions.
This architecture isolates media, UI, and network tasks to improve reliability. Lifesize uses dedicated renderer, signaling, and audio subsystems to manage calls; it communicates securely with Lifesize cloud services via WebSocket and REST APIs, enabling sessions and permissions.
Quick Fact: Lifesize leverages multi-process design to keep media, UI, and signaling separated for better stability during calls.
Types of Lifesize Processes
- Launcher Process: Starts the Lifesize desktop client and coordinates startup tasks
- UI/Renderer Process: Renders the user interface for meetings and controls
- Signaling Process: Manages server signaling for session establishment
- Media Process: Handles audio/video capture and playback streams
- Background/Updater Process: Performs background checks, updates, and cache management
- Plugin/Extension Process: Supports optional Lifesize plugins or integrations
Is lifesize.exe Safe?
Yes, lifesize.exe is safe when it's the legitimate file from Lifesize downloaded from official sources or pre-installed by the manufacturer.
Is lifesize.exe a Virus or Malware?
The real lifesize.exe is NOT a virus. However, malware can impersonate legitimate names. Always verify the file location and signature.
How to Tell if lifesize.exe is Legitimate or Malware
- File Location: Must be in C:\\Program Files\\Lifesize\\Lifesize.exe or C:\\Program Files (x86)\\Lifesize\\Lifesize.exe. Any lifesize.exe elsewhere is suspicious.
- Digital Signature: Right-click the file in Explorer or Task Manager → Open file location → Right-click Lifesize.exe → Properties → Digital Signatures. Should show 'Lifesize, Inc.'
- Resource Usage: Normal usage is 2-15% CPU per session, 50-300 MB total memory. Extremely high usage when idle is suspicious.
- Behavior: Lifesize should run during active conferencing. Unexpected background activity or persistence after logout warrants malware scanning.
Red Flags: If lifesize.exe is located in unusual folders (like Temp or AppData), runs when Lifesize isn't opened, lacks a valid signature, or uses persistent high resources, scan with antivirus. Watch for similarly-named files like 'lifesize_agent.exe' from untrusted sources.
Why Is lifesize.exe Running on My PC?
lifesize.exe runs when you start the Lifesize Desktop Client or when Lifesize is configured to operate in the background for quick accessibility and meeting readiness.
Reasons it's running:
- Active Conference Use: You are in a Lifesize meeting or have an active call; the process handles media and signaling for the session.
- Background Apps: Lifesize extensions or integrations may keep the process running to monitor availability or receive room notifications.
- Startup Program: Lifesize can be configured to launch automatically at Windows startup, keeping lifesize.exe resident.
- Background Sync: Lifesize may synchronize settings, contacts, and meeting data with the Lifesize cloud, sustaining a ready state.
- System Tray App: "Continue running background apps when Lifesize is closed" may keep lifesize.exe alive for quick rejoin.
Can I Disable or Remove lifesize.exe?
Yes, you can disable lifesize.exe. It's safe to close Lifesize when not in use, and you can uninstall it completely if you prefer a different conferencing solution.
How to Stop lifesize.exe
- End Lifesize in System Tray: Right-click the Lifesize icon in the system tray and select Exit.
- End Individual Processes: Open Task Manager (Ctrl+Shift+Esc), find lifesize.exe, and End Task.
- Disable Startup: Task Manager → Startup tab → Disable Lifesize Desktop
- Disable Background Running: Lifesize Settings → General → uncheck 'Start Lifesize on login' or 'Continue running in background' as applicable
- Uninstall Lifesize: Windows Settings → Apps → Lifesize → Uninstall
How to Uninstall Lifesize
- ✔ Windows Settings → Apps → Apps & features → Lifesize → Uninstall
- ✔ Control Panel → Programs → Programs and Features → Lifesize → Uninstall
- ✔ Consider alternative conferencing software if needed
Common Problems: High CPU or Memory Usage
If lifesize.exe is consuming excessive resources:
Common Causes & Solutions
- Too Many Meetings or Active Calls: Close unused calls or mute video; reduce simultaneous streams and disable video where appropriate.
- Background Extensions/Integrations: Disable unnecessary Lifesize integrations in the app settings.
- Network-Heavy Web Conferencing: Limit server regions, adjust media quality, or pause screen sharing when not needed.
- Outdated Client: Update Lifesize to the latest version via Settings → Help → Check for updates.
- Hardware Acceleration Issues: Toggle hardware acceleration off in Lifesize or system browser settings if applicable.
- Corrupted Cache: Clear Lifesize cache/data from the app settings or reinstall to reset state.
Quick Fixes:
1. Use Task Manager to identify heavy lifesize.exe processes and end nonessential ones
2. Update Lifesize to the latest version
3. Disable unnecessary extensions/integrations in Lifesize
4. Restart Lifesize or your computer
5. Toggle off hardware acceleration if issues persist
Frequently Asked Questions
Is lifesize.exe a virus?
No, the legitimate lifesize.exe from Lifesize is not a virus. Ensure the file is located at C:\\Program Files\\Lifesize\\Lifesize.exe or C:\\Program Files (x86)\\Lifesize\\Lifesize.exe and has a valid digital signature from Lifesize, Inc.
Why is lifesize.exe using so much CPU?
High CPU usage is usually caused by active meetings, video rendering, or background tasks like screen sharing. Use Lifesize Task Manager within the app to identify the culprit and reduce video quality or close unnecessary calls.
Can I delete lifesize.exe?
Yes, you can uninstall Lifesize through Windows Settings → Apps if you no longer need it. Your local meeting data remains synced to your account if you use cloud storage; otherwise, data is removed with uninstall.
Can I disable lifesize.exe?
Yes. Close Lifesize, disable startup in Task Manager, and turn off background running in Lifesize settings to prevent automatic startup or background activity.
Why does Lifesize start at login?
Lifesize may be configured to start at login to ensure quick access to meetings. Disable this in Task Manager → Startup or Lifesize settings to stop automatic launch.
How do I reduce Lifesize memory usage?
Close unused meetings, disable unnecessary integrations, clear cache, update to the latest version, and consider lowering video quality or turning off high-bandwidth features when on limited hardware.