Windivert Driver Cannot Be Installed You Must Restart Your Computer Top May 2026

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Windivert Driver Cannot Be Installed You Must Restart Your Computer Top May 2026

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Windivert Driver Cannot Be Installed You Must Restart Your Computer Top May 2026

If you are seeing the error message "WinDivert driver cannot be installed you must restart your computer to complete the installation" (or a variation regarding the WinDivert driver), it typically indicates a conflict with a previous driver state or a pending system operation.

This error is commonly associated with networking tools, ad-blockers (like Portmaster or certain GitHub projects), and packet sniffing applications that rely on the WinDivert library to capture and filter network traffic.

Here is a breakdown of why this happens and how to resolve it.

Outdated Windows builds can have driver signature enforcement issues. Run Windows Update and restart.

Most likely solution:
Just restart your computer before doing anything else. The driver installation was interrupted, and Windows is waiting for a reboot to complete it.

If you need help with a specific software (e.g., Proxifier, Charles, Fiddler), let me know and I’ll give you the exact steps for that tool.

Fixing the "WinDivert driver cannot be installed, you must restart your computer" error typically requires clearing stuck driver services or addressing permission conflicts. This error occurs because WinDivert is a kernel-level packet interception driver that must be installed "on demand" by an application—if a previous version is still active or a service entry is corrupted, the installation fails. Immediate Solutions to Fix the Installation Error 1. Manually Stop and Delete the WinDivert Service If you are seeing the error message "WinDivert

The most common cause is a ghost service from a previous session. You can forcibly remove it via the Command Prompt: Open Command Prompt as an Administrator. Type sc stop windivert and press Enter. Type sc delete windivert and press Enter. Restart your computer to clear the system's driver state. 2. Run as Administrator

WinDivert requires Administrator privileges to load its driver into the Windows kernel. If the application using WinDivert (like GoodbyeDPI or a VPN) is not run as an admin, it will trigger an installation failure. 3. Clear Registry Corruptions

If the service commands don't work, a corrupted registry entry might be blocking the driver:

Press Win + R, type regedit, and navigate to:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDivert Right-click the WinDivert folder and select Delete. Restart your PC. Common Causes for Failed Installation WinDivert – Real-Time Network Traffic Control on Windows

The error "WinDivert driver cannot be installed, you must restart your computer" typically occurs when a program using the library—often tools like GoodbyeDPI

—fails to load its network driver due to a conflict or a "zombie" service from a previous session. Stack Overflow The Story Behind the Loop Most likely solution: Just restart your computer before

When you run a WinDivert-based app, it attempts to install a kernel-mode driver on the fly. If the driver is already partially loaded in a "stuck" state, or if an older version's service is still registered, Windows blocks the new installation. The system suggests a restart because that's the easiest way to clear out resident drivers, but sometimes the "zombie" service survives even a reboot if it's set to auto-start or if the registry is corrupted. Common Fixes (No Restart Loop Required)

If restarting hasn't worked, you can usually break the cycle manually: Kill Stuck Services Command Prompt as Administrator

and run these commands to force-stop and delete the old driver instance: sc stop WinDivert sc delete WinDivert Use code with caution. Copied to clipboard (Note: The service name might vary by version, such as WinDivert1.4 WinDivert2.0 Check Administrator Privileges

: The driver cannot install without elevated rights. Always right-click your application and select Run as Administrator Antivirus Interference : Security software like

often flags WinDivert as suspicious because it intercepts network packets, blocking its installation. Try temporarily disabling your antivirus to see if the driver installs. Manual Registry Cleanup : As a last resort, navigate to

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDivert Registry Editor and delete the entry before rebooting. Why it Happens on Older Windows If you are on If you are seeing the error message "WinDivert

, the installation might fail because the modern WinDivert driver is signed with

, which older systems don't recognize without specific updates (like Command Prompt

instructions for a different version of WinDivert or a specific app like GoodbyeDPI WinDivert not working on Windows 10 20H2 #253 - GitHub

Windows 10 and 11 require drivers to be digitally signed by Microsoft. While official WinDivert releases are signed, some older or custom-compiled versions may trigger a signature error (sometimes misreported as the “must restart” message).

WinDivert uses a test-signed certificate. On 64-bit Windows with Secure Boot enabled, driver signature enforcement may block unsigned or self-signed kernel drivers, causing the installation to fail.

If the error persists: