diff -Nurp VirtualBox-5.1.0.p13/src/VBox/Frontends/VirtualBox/src/widgets/UINameAndSystemEditor.cpp VirtualBox-5.1.0.p14/src/VBox/Frontends/VirtualBox/src/widgets/UINameAndSystemEditor.cpp
--- VirtualBox-5.1.0.p13/src/VBox/Frontends/VirtualBox/src/widgets/UINameAndSystemEditor.cpp	2016-07-12 17:54:10.000000000 +0300
+++ VirtualBox-5.1.0.p14/src/VBox/Frontends/VirtualBox/src/widgets/UINameAndSystemEditor.cpp	2016-07-13 21:17:09.116398677 +0300
@@ -213,6 +213,10 @@ void UINameAndSystemEditor::prepareFamil
 
     /* Choose the 1st item to be the current: */
     m_pComboFamily->setCurrentIndex(0);
+    /* Default to Linux */
+    const int liIndex = m_pComboFamily->findData("Linux", TypeID);
+    if (liIndex != -1)
+        m_pComboFamily->setCurrentIndex(liIndex);
     /* And update the linked widgets accordingly: */
     sltFamilyChanged(m_pComboFamily->currentIndex());
 }
@@ -317,6 +321,16 @@ void UINameAndSystemEditor::sltFamilyCha
         if (iTypeIndex != -1)
             m_pComboType->setCurrentIndex(iTypeIndex);
     }
+    /* Or select Mageia item for Linux family as default: */
+    else if (strFamilyId == "Linux")
+    {
+        QString strDefaultID = "Mageia";
+        if (ARCH_BITS == 64 && m_fSupportsHWVirtEx && m_fSupportsLongMode)
+            strDefaultID += "_64";
+        const int iIndexMageia = m_pComboType->findData(strDefaultID, TypeID);
+        if (iIndexMageia != -1)
+            m_pComboType->setCurrentIndex(iIndexMageia);
+    }
     /* Or select Windows 7 item for Windows family as default: */
     else if (strFamilyId == "Windows")
     {
@@ -327,16 +341,6 @@ void UINameAndSystemEditor::sltFamilyCha
         if (iIndexWin7 != -1)
             m_pComboType->setCurrentIndex(iIndexWin7);
     }
-    /* Or select Ubuntu item for Linux family as default: */
-    else if (strFamilyId == "Linux")
-    {
-        QString strDefaultID = "Ubuntu";
-        if (ARCH_BITS == 64 && m_fSupportsHWVirtEx && m_fSupportsLongMode)
-            strDefaultID += "_64";
-        const int iIndexUbuntu = m_pComboType->findData(strDefaultID, TypeID);
-        if (iIndexUbuntu != -1)
-            m_pComboType->setCurrentIndex(iIndexUbuntu);
-    }
     /* Else simply select the first one present: */
     else
         m_pComboType->setCurrentIndex(0);