diff --git a/src/install-helper/install-helper.c b/src/install-helper/install-helper.c
index aec9a75..eb425b2 100644
--- a/src/install-helper/install-helper.c
+++ b/src/install-helper/install-helper.c
@@ -127,8 +127,50 @@ DWORD StopXenbusMonitor()
     return status;
 }
 
+/*
+ * Automatically accept the prompt for installing test-signed drivers.
+ */
+DWORD ApproveTestSign(void* param)
+{
+    while (TRUE)
+    {
+        HWND window = FindWindow(NULL, L"Windows Security");
+        if (window)
+        {
+            DWORD fg_tid = GetWindowThreadProcessId(GetForegroundWindow(), NULL);
+            DWORD tid = GetCurrentThreadId();
+            // Without this, focus-stealing mitigations can prevent activating the target window.
+            if (tid != fg_tid)
+                AttachThreadInput(fg_tid, tid, TRUE);
+
+            BringWindowToTop(window);
+            ShowWindow(window, SW_SHOW);
+
+            while (GetForegroundWindow() != window)
+                Sleep(100);
+
+            INPUT inputs[2];
+            inputs[0].type = INPUT_KEYBOARD;
+            inputs[0].ki.wVk = 'i';
+            inputs[1].type = INPUT_KEYBOARD;
+            inputs[1].ki.dwFlags = KEYEVENTF_KEYUP;
+            inputs[1].ki.wVk = 'i';
+            SendInput(ARRAYSIZE(inputs), inputs, sizeof(INPUT));
+            break;
+        }
+        else
+        {
+            Sleep(100);
+        }
+    }
+    return 0;
+}
+
 int WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
 {
     (void)AddSymlinkRightToUsers();
+    HANDLE thread = CreateThread(NULL, 0, ApproveTestSign, NULL, 0, NULL);
+    if (WaitForSingleObject(thread, 1800000) == WAIT_TIMEOUT)
+        TerminateThread(thread, 0);
     return (int)StopXenbusMonitor();
 }
diff --git a/vs2022/installer/CoreComponents.wxs b/vs2022/installer/CoreComponents.wxs
index 316a836..40da43b 100644
--- a/vs2022/installer/CoreComponents.wxs
+++ b/vs2022/installer/CoreComponents.wxs
@@ -38,6 +38,15 @@
       />
     </Property>
 
+    <Property Id="DPF_SET">
+      <RegistrySearch
+        Root="HKLM"
+        Key="SYSTEM\CurrentControlSet\Control\Session Manager\Debug Print Filter"
+        Name="IHVDRIVER"
+        Type="raw"
+      />
+    </Property>
+
     <ComponentGroup Id="CoreComponents">
 
       <?if $(env.TEST_SIGN) ?>
@@ -132,6 +141,16 @@
         </RegistryKey>
       </Component>
 
+      <Component
+        Guid="{CD253E87-10A2-4BAA-AFA5-6AF0A87DCFAB}"
+        Id="DebugPrintFilter"
+        Condition="NOT DPF_SET"
+        Directory="INSTALL_DIR">
+        <RegistryKey Root="HKLM" Key="SYSTEM\CurrentControlSet\Control\Session Manager\Debug Print Filter">
+          <RegistryValue Name="IHVDRIVER" Type="integer" Value="3" />
+        </RegistryKey>
+      </Component>
+
       <Component
         Guid="{C824195C-F828-4FF5-BFCA-3143F0D89916}"
         Id="SystemSettings"
@@ -144,10 +163,6 @@
           </RegistryValue>
         </RegistryKey>
 
-        <RegistryKey Root="HKLM" Key="SYSTEM\CurrentControlSet\Control\Session Manager\Debug Print Filter">
-          <RegistryValue Name="IHVDRIVER" Type="integer" Value="3" />
-        </RegistryKey>
-
         <!-- Enable paths longer than MAX_PATH for FS APIs by default -->
         <RegistryKey Root="HKLM" Key="SYSTEM\CurrentControlSet\Control\FileSystem">
           <RegistryValue Name="LongPathsEnabled" Type="integer" Value="1" />