launch user-installs automatically if they're present and the user consents

java/net/i2p/router/WinLauncher.java

@@ -96,8 +96,7 @@ public class WinLauncher extends CopyConfigDir {
     }
     continuerunning = promptUserInstallStartIfAvailable();
     if (!continuerunning) {
-      logger.severe(
+      logger.severe("User-install startup required.");
-          "User-install startup required.");
       System.exit(2);
     }
 

java/net/i2p/router/WindowsServiceUtil.java

@@ -143,6 +143,17 @@ public class WindowsServiceUtil {
     return "http://tc73n4kivdroccekirco7rhgxdg5f3cjvbaapabupeyzrqwv5guq.b32.i2p/news.su3";
   }
 
+  public static String getProgramFilesInstall() {
+    String programFiles = System.getenv("PROGRAMFILES");
+    File programFilesI2P = new File(programFiles, "i2p/i2p.exe");
+    if (programFilesI2P.exists())
+      return programFilesI2P.getAbsolutePath();
+    String programFiles86 = System.getenv("PROGRAMFILES86");
+    File programFiles86I2P = new File(programFiles86, "i2p/i2p.exe");
+    if (programFiles86I2P.exists())
+      return programFiles86I2P.getAbsolutePath();
+  }
+
   public static boolean checkProgramFilesInstall() {
     String programFiles = System.getenv("PROGRAMFILES");
     File programFilesI2P = new File(programFiles, "i2p/i2p.exe");
@@ -174,13 +185,13 @@ public class WindowsServiceUtil {
         // Do nothing here, this will continue on to launch a jpackaged router
         return true;
       } else {
-        // We can't just call `net start` or `sc start` directly, that throws
+        try {
-        // a permission error. We can start services.msc though, where the
+          Runtime.getRuntime().exec(getProgramFilesInstall());
-        // user can start the service themselves. OR maybe we ask for
+        } catch (IOException e) {
-        // elevation here? May need to refactor Elevator and Shell32X to
-        // achieve it though
           return false;
         }
+        return true;
+      }
     }
     return true;
   }