Windivert Driver Cannot Be Installed You Must Restart Your Computer [patched] [ TRUSTED ◉ ]

Resolving the "WinDivert Driver Cannot Be Installed" Error: A Complete Guide

If you are reading this, you have likely been interrupted by a frustrating pop-up window displaying the message: "WinDivert driver cannot be installed. You must restart your computer."

  • Go to C:\Windows\System32\drivers\ – delete windivert64.sys if it exists.
  • Delete C:\Program Files\WinDivert\ (if present).

Step 4: Disable Antivirus and Windows Security Temporarily

Modern antivirus engines (Bitdefender, Kaspersky, Malwarebytes, and even Windows Defender) sometimes flag WinDivert as a "potentially unwanted driver" because it can be used for man-in-the-middle attacks.

Technical Analysis and Resolution of the WinDivert Driver Installation Error Requiring System Reboot

Abstract

The Windows Divert (WinDivert) package is a user-mode packet capture and modification library widely used in applications such as VPN clients, firewalls, network monitors, and traffic shapers. A common installation error — "WinDivert driver cannot be installed; you must restart your computer" — indicates a systemic failure in the driver loading process. This paper examines the root causes of this error, the underlying Windows driver installation mechanics, and provides a systematic troubleshooting and resolution framework. The paper concludes with best practices for developers and end-users to prevent recurrence. Resolving the "WinDivert Driver Cannot Be Installed" Error:

If restarting hasn't worked, the service might be re-registering itself automatically.

is enabled if you are using an unsigned or self-built version of the driver. Run Bcdedit.exe -set TESTSIGNING ON and restart. WinDivert not working on Windows 10 20H2 #253 - GitHub Go to C:\Windows\System32\drivers\ – delete windivert64

Step 6: Perform a Clean Installation

If none of the above steps work, try performing a clean installation of the WinDivert driver:

The Algorithm:

If you are seeing the error "WinDivert driver cannot be installed, you must restart your computer," you are likely stuck in a loop where restarting doesn't actually solve the problem. This typically happens because an old or orphaned version of the WinDivert service is still registered in your system, or modern security features are blocking the driver from loading.