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copied!<p>Thanks for the additional diagnostic information that you gave in the comments. Your description of the problem has allowed me to isolate this as a bug in Windows.</p> <p>The problem occurs when first installing a filter. NDIS may, in some cases, ignore the notification that the bindings on a miniport have changed, if the filter driver hasn't started in kernelmode yet.</p> <p>There are several workarounds - as you've noted, one workaround is to change the StartType of the filter. Another workaround would be to use INetCfg to disable and re-enable the filter bindings to each miniport after installation. You can also disable and re-enable the miniports, or reboot the computer, although those are rather disruptive workarounds.</p> <p>✓ This bug does not affect Windows 7.<br> ✗ This bug affects Windows 8 and Windows Server 2012.<br> ✓ This bug does not affect Windows 8.1 and Windows Server 2012 R2. (I unknowingly fixed this bug while cleaning up some code in NDIS.)</p> <p>If you cannot wait for the free Windows 8.1 update <a href="http://blogs.windows.com/windows/b/bloggingwindows/archive/2013/08/27/readying-windows-8-1-for-release.aspx" rel="nofollow">to roll out to all Windows 8 machines</a>, you can contact Microsoft WDK support. Please reference WindowsSE:452306 so that they can find my notes on the issue, or have them contact me internally.</p> <pre><code>// // DisableEnableBindings // // Purpose: This code can be used to quickly disable/enable all bindings to a particular // NDIS protocol or filter. // // Usage: Run this and provide the name of a NetCfg component. For example, "ms_pacer". #include <Windows.h> #include <netcfgx.h> #include <atlbase.h> #include <atlcom.h> #include <stdio.h> #include <vector> #define MY_APP_NAME L"DisableEnableBindings test app" bool RestartAllBindings(INetCfg *netcfg, PCWSTR name) { HRESULT hr; CComPtr<INetCfgComponent> comp; CComPtr<INetCfgComponentBindings> bindings; hr = netcfg->FindComponent(name, &comp); if (FAILED(hr)) { wprintf(L"INetCfg::FindComponent 0x%08x\n", hr); return false; } hr = comp.QueryInterface(&bindings); if (FAILED(hr)) { wprintf(L"QueryInterface(INetCfgComponentBindings) 0x%08x\n", hr); return false; } CComPtr<IEnumNetCfgBindingPath> enumerator; hr = bindings->EnumBindingPaths(EBP_BELOW, &enumerator); if (FAILED(hr)) { wprintf(L"INetCfgComponentBindings::EnumBindingPaths 0x%08x\n", hr); return false; } // Loop over all bindings that involve this component while (true) { CComPtr<INetCfgBindingPath> path; hr = enumerator->Next(1, &path, nullptr); if (hr == S_FALSE) { // Reached end of list; quit. break; } if (FAILED(hr)) { wprintf(L"IEnumNetCfgBindingPath::Next 0x%08x\n", hr); return false; } PWSTR token = nullptr; hr = path->GetPathToken(&token); if (FAILED(hr)) { wprintf(L"INetCfgBindingPath::GetPathToken 0x%08x\n", hr); continue; } wprintf(L"Found binding %s\n", token); CoTaskMemFree(token); hr = path->IsEnabled(); if (FAILED(hr)) { wprintf(L"INetCfgBindingPath::IsEnabled 0x%08x\n", hr); continue; } if (S_FALSE == hr) { wprintf(L"\tPath is already disabled. Skipping over it.\n"); continue; } // Diable hr = path->Enable(FALSE); if (FAILED(hr)) { wprintf(L"INetCfgBindingPath::Enable(FALSE) 0x%8x\n", hr); continue; } hr = netcfg->Apply(); if (FAILED(hr)) { wprintf(L"INetCfg::Apply 0x%08x\n", hr); return false; } wprintf(L"\tPath disabled\n"); // Enable hr = path->Enable(TRUE); if (FAILED(hr)) { wprintf(L"INetCfgBindingPath::Enable(TRUE) 0x%8x\n", hr); return false; } hr = netcfg->Apply(); if (FAILED(hr)) { wprintf(L"INetCfg::Apply 0x%08x\n", hr); return false; } wprintf(L"\tPath enabled\n"); } return true; } bool ConnectToNetCfg(PCWSTR name) { HRESULT hr; CComPtr<INetCfg> netcfg; CComPtr<INetCfgLock> lock; // Before we can get started, we need to do some initialization work. hr = netcfg.CoCreateInstance(CLSID_CNetCfg); if (FAILED(hr)) { wprintf(L"CoCreateInstance(CLSID_CNetCfg 0x%08x\n", hr); return false; } hr = netcfg.QueryInterface(&lock); if (FAILED(hr)) { wprintf(L"QueryInterface(INetCfgLock) 0x%08x\n", hr); return false; } // Note that this call can block. hr = lock->AcquireWriteLock(INFINITE, MY_APP_NAME, nullptr); if (FAILED(hr)) { wprintf(L"INetCfgLock::AcquireWriteLock 0x%08x\n", hr); return false; } hr = netcfg->Initialize(nullptr); if (FAILED(hr)) { wprintf(L"INetCfg::Initialize 0x%08x\n", hr); return false; } bool ok = RestartAllBindings(netcfg.p, name); hr = netcfg->Uninitialize(); if (FAILED(hr)) { wprintf(L"INetCfg::Uninitialize 0x%08x\n", hr); } hr = lock->ReleaseWriteLock(); if (FAILED(hr)) { wprintf(L"INetCfgLock::ReleaseWriteLock 0x%08x\n", hr); } return ok; } int wmain(int argc, wchar_t **argv) { if (argc != 2) { wprintf(L"Usage: DisableEnableBindings <componentId>\n"); return 2; } PCWSTR name = argv[1]; CComPtr<INetCfg> netcfg; CComPtr<INetCfgLock> lock; HRESULT hr; hr = CoInitializeEx(nullptr, COINIT_MULTITHREADED); if (FAILED(hr)) { wprintf(L"CoInitializeEx 0x%08x\n", hr); return 1; } bool ok = ConnectToNetCfg(name); CoUninitialize(); wprintf(ok ? L"Succeeded.\n" : L"Failed.\n"); return ok ? 0 : 1; } </code></pre>

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