diff --git a/setup/Setup.cpp b/setup/Setup.cpp
index 69c3a6a1a..69c4aa2d6 100755
--- a/setup/Setup.cpp
+++ b/setup/Setup.cpp
@@ -840,14 +840,16 @@ void CampoSetup::NormalSetup()
 
 bool CampoSetup::CampoRunning(const wxString& strAppName, const wxString& strMsg) const
 {
-  bool ok = false;
   wxSingleInstanceChecker sicProgram(strAppName);
-  if (sicProgram.IsAnotherRunning())
-  {
+
+  int i;
+  for (i = 3; i > 0 && sicProgram.IsAnotherRunning(); i--)
+    wxSleep(1);
+
+  if (i <= 0)
     ErrorBox(strMsg);
-    ok = true;
-  }
-  return ok;
+
+  return i <= 0;
 }