ultravnc.exe

What is ultravnc.exe?

ultravnc.exe is the core server executable for UltraVNC. It runs the UltraVNC service or process to listen for incoming VNC connections, manage remote sessions, and coordinate optional features. It works in tandem with the viewer and supports remote control and file transfer.

UltraVNC uses a client/server model where ultravnc.exe handles the server side, accepts connections, and coordinates access. It supports optional encryption and password protection to secure remote sessions.

Types of UltraVNC Processes

• Server Process: Main UltraVNC server listening for connections (ultravnc.exe)
• Viewer Process: VNC Viewer client component (vncviewer.exe) used to connect
• File Transfer Helper: Module handling optional file transfer between host and client
• Service Host: Windows service wrapper for unattended remote access
• Driver/Hook: Optional components for performance and keyboard/mouse capture
• Web/Websocket Bridge: Web-based connections via web browser when enabled

Is ultravnc.exe Safe?

Yes, ultravnc.exe Safe when it's the legitimate file from UltraVNC downloaded from official sources or installed by a trusted distributor.

Is ultravnc.exe a Virus or Malware?

The real ultravnc.exe is NOT a virus. Malware may masquerade with similar names; verify location and signature.

How to Tell if ultravnc.exe is Legitimate or Malware

1. File Location: Must be in C:\Program Files\UltraVNC\ultravnc.exe or C:\Program Files (x86)\UltraVNC\ultravnc.exe. Any ultravnc.exe elsewhere is suspicious.
2. Digital Signature: Right-click the process in Task Manager → Open file location → Right-click ultravnc.exe → Properties → Digital Signatures. Should show signer like "UltraVNC Project".
3. Resource Usage: Normal usage is 1-15% CPU per session and 20-120 MB memory. Unusually high usage when idle is suspicious.
4. Behavior: UltraVNC should only run when remote access is configured or a client connects. Constant background activity may indicate malware.

Why Is ultravnc.exe Running on My PC?

ultravnc.exe runs when UltraVNC server is installed and configured, starting either as a service or manual server process to accept remote connections.

Reasons it's running:

• Active Remote Session: A connected VNC client or viewer session keeps ultravnc.exe running to manage that session.
• Windows Service: If UltraVNC is installed as a service, the process runs continuously to allow unattended access.
• Startup Configuration: Windows startup may launch the UltraVNC server automatically if set in Startup or services.
• Background Tasks: File transfer, chat, or encryption modules may run in background as part of the server.
• Configuration Changes: New connections, password changes, or encryption settings can cause the server to restart or spawn new processes.

Can I Disable or Remove ultravnc.exe?

Yes, you can disable ultravnc.exe. It's safe to stop or remove UltraVNC if remote access isn't needed or you prefer another solution.

How to Stop ultravnc.exe

• Stop the Service: Open Services (services.msc), locate UltraVNC Server, and stop the service.
• Disable Startup: In Services, set Startup type to Disabled, or use Task Manager → Startup to disable UltraVNC Server.
• Terminate Process: Open Task Manager (Ctrl+Shift+Esc), find ultravnc.exe, right-click End Task.
• Disable Auto Start: Re-run the installer and uncheck remote access options or uninstall.
• Confirm: Reboot to ensure the process does not restart automatically.

How to Uninstall UltraVNC

• ✔ Windows Settings -> Apps -> Apps & Features -> UltraVNC -> Uninstall
• ✔ Control Panel -> Programs -> Uninstall a program -> UltraVNC -> Uninstall
• ✔ Optionally remove left-over config folders in C:\ProgramData\UltraVNC and C:\Users\<User>\AppData\Roaming\UltraVNC

Common Problems: High CPU or Memory Usage

If ultravnc.exe is consuming excessive resources or not performing as expected:

Common Causes & Solutions

• Many connected clients: Each client adds session overhead. Limit connections or use encryption and compression settings to reduce load.
• Network latency: High latency can cause perceived slowness; optimize network and enable compression.
• Misconfigured password or encryption: Set a strong password and consider enabling SSL encryption or SSH tunneling if supported.
• Outdated software: Update UltraVNC to latest version to fix bugs and security issues.
• Conflicting security software: Antivirus/firewall may block legitimate traffic; whitelist UltraVNC ports (5900/5800).
• Remote file transfer heavy usage: Disable or limit file transfer while remote control is active, or use external secure transfer methods.

Related Processes