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

Based on your request, it seems you are encountering a persistent WinDivert error where the driver installation fails, and the system demands a restart (often caused by a "System Restart Pending" state in Windows).

Below is a feature design for a "Smart Driver Installer" module. This feature is designed to be integrated into applications using WinDivert (like network blockers, sniffers, or firewalls) to handle this specific error gracefully without crashing or confusing the user.

2. User Interface Design

When the error occurs, do not show a generic Windows error message. Show a context-aware modal.

Mockup: The "Action Required" Overlay

-----------------------------------------------------------
|  Network Filter Setup                            [X]    |
-----------------------------------------------------------
|   [Icon: Orange Exclamation]                             |
|                                                          |
|   System Restart Required                                |
|                                                          |
|   The WinDivert network driver cannot be installed       |
|   because Windows has pending updates or file operations |
|   that require a restart to complete.                    |
|                                                          |
|   [ ] Automatically restart my computer now              |
|                                                          |
|   [Restart Later]              [Restart Now]             |
-----------------------------------------------------------

2. Temporarily Disable Driver Signature Enforcement

For Windows 10/11 Home/Pro only. Re-enable after the install.

• Open Settings > Update & Security > Recovery.
• Under “Advanced startup,” click Restart now.
• After reboot: Troubleshoot > Advanced Options > Startup Settings > Restart.
• Press 7 or F7 for “Disable driver signature enforcement.”

Now install your app (Proxifier/Windscribe/etc.) again. The WinDivert driver should install successfully.

Preventing the Error in the Future

Once you have successfully installed your application, follow these best practices to avoid seeing the "WinDivert driver cannot be installed" error again: Based on your request, it seems you are

• Avoid multiple proxifiers/VPNs: Do not install two different programs that both rely on WinDivert. If you must, run them one at a time, but expect conflicts.
• Always restart after uninstalling: When you remove a VPN or proxifier, restart immediately. This allows the WinDivert driver to be fully unloaded.
• Use a dedicated script for updates: Some applications provide a cleanup.bat script before updating. Always run these as Administrator.
• Check for Windows Feature Updates: Major Windows updates (e.g., from 22H2 to 23H2) sometimes reset driver signing policies. After a feature update, reinstall your WinDivert-based software.

Step 4: Disable Conflicting Network Drivers

If other network drivers or software are installed, try disabling them to see if they are causing conflicts:

• Open Device Manager (Press Windows key + X and select Device Manager).
• Expand the "Network Adapters" section.
• Right-click on each network adapter and select "Disable device."

Still Stuck? Try the Nuclear Option (But Safe)

If none of the above work, the driver may be permanently flagged by Windows’ Driver Blocklist:

1. Open regedit and go to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\CI\Policy
2. Look for BlockedDriverList – if WinDivert appears, delete its entry (back up first).

Note: This is rare. Only attempt if you’re comfortable with the Registry. Open Settings > Update & Security > Recovery

Step 3: Uninstall All Applications that Use WinDivert

Conflicts arise when multiple applications try to install different versions of WinDivert. You need to remove them all, then reinstall the one you want.

1. Open Control Panel > Programs and Features.
2. Look for any of the following common offenders:
   • SocksEscort, Proxifier, ProxyCap
   • NoPing, ExitLag, WTFast, Kill Ping, Smooth Ping
   • NetLimiter, NetBalancer
   • SimpleDNSCrypt, YogaDNS
   • Any "packet sniffer" or "traffic shaper"
3. Uninstall each one, and when prompted, restart your computer between uninstalls.
4. After all are removed, go to C:\Windows\System32\drivers\ and manually delete windivert.sys (you may need to take ownership or boot into Safe Mode).
5. Reboot, then reinstall your desired application.

Step 5: Update WinDivert Driver

Ensure that you are using the latest version of the WinDivert driver:

• Visit the WinDivert official website and download the latest driver package.
• Follow the installation instructions carefully.