diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index 50409fb55e5..7e6d15115d5 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -35,7 +35,7 @@ $allowinstall = 0;
 $allowupgrade = false;
 $checksok = 1;
 
-$setuplang=GETPOST("selectlang",'',3)?GETPOST("selectlang",'',3):$langs->getDefaultLang();
+$setuplang=GETPOST("selectlang",'az09',3)?GETPOST("selectlang",'az09',3):$langs->getDefaultLang();
 $langs->setDefaultLang($setuplang);
 
 $langs->load("install");
@@ -345,6 +345,10 @@ else
 			$conf->db->dolibarr_main_db_cryptkey = $dolibarr_main_db_cryptkey;
 
 			$conf->setValues($db);
+			// Reset forced setup after the setValues
+			if (defined('SYSLOG_FILE')) $conf->global->SYSLOG_FILE=constant('SYSLOG_FILE');
+			$conf->global->MAIN_ENABLE_LOG_TO_HTML = 1;
+
 			// Current version is $conf->global->MAIN_VERSION_LAST_UPGRADE
 			// Version to install is DOL_VERSION
 			$dolibarrlastupgradeversionarray=preg_split('/[\.-]/',isset($conf->global->MAIN_VERSION_LAST_UPGRADE) ? $conf->global->MAIN_VERSION_LAST_UPGRADE : (isset($conf->global->MAIN_VERSION_LAST_INSTALL)?$conf->global->MAIN_VERSION_LAST_INSTALL:''));
diff --git a/htdocs/install/repair.php b/htdocs/install/repair.php
index 4f2e5f53201..bc2f165a30c 100644
--- a/htdocs/install/repair.php
+++ b/htdocs/install/repair.php
@@ -42,10 +42,8 @@ error_reporting(0);
 @set_time_limit(120);
 error_reporting($err);
 
-$setuplang=GETPOST("selectlang",'',3)?GETPOST("selectlang",'',3):'auto';
+$setuplang=GETPOST("selectlang",'az09',3)?GETPOST("selectlang",'az09',3):'auto';
 $langs->setDefaultLang($setuplang);
-$versionfrom=GETPOST("versionfrom",'',3)?GETPOST("versionfrom",'',3):(empty($argv[1])?'':$argv[1]);
-$versionto=GETPOST("versionto",'',3)?GETPOST("versionto",'',3):(empty($argv[2])?'':$argv[2]);
 
 $langs->loadLangs(array("admin","install","other"));
 
@@ -155,7 +153,9 @@ if ($ok)
 }
 
 $conf->setValues($db);
-
+// Reset forced setup after the setValues
+if (defined('SYSLOG_FILE')) $conf->global->SYSLOG_FILE=constant('SYSLOG_FILE');
+$conf->global->MAIN_ENABLE_LOG_TO_HTML = 1;
 
 
 /* Start action here */
@@ -588,8 +588,6 @@ if ($ok && GETPOST('clean_menus','alpha'))
 // clean_orphelin_dir: Run purge of directory
 if ($ok && GETPOST('clean_orphelin_dir','alpha'))
 {
-    $conf->setValues($db);
-
     $listmodulepart=array('company','invoice','invoice_supplier','propal','order','order_supplier','contract','tax');
     foreach ($listmodulepart as $modulepart)
     {
diff --git a/htdocs/install/step5.php b/htdocs/install/step5.php
index b7d320aab59..df8ec9812c1 100644
--- a/htdocs/install/step5.php
+++ b/htdocs/install/step5.php
@@ -165,6 +165,9 @@ if ($action == "set" || empty($action) || preg_match('/upgrade/i',$action))
         if ($db->connected)
         {
             $conf->setValues($db);
+            // Reset forced setup after the setValues
+            if (defined('SYSLOG_FILE')) $conf->global->SYSLOG_FILE=constant('SYSLOG_FILE');
+            $conf->global->MAIN_ENABLE_LOG_TO_HTML = 1;
 
             // Create admin user
             include_once DOL_DOCUMENT_ROOT .'/user/class/user.class.php';
@@ -295,6 +298,9 @@ if ($action == "set" || empty($action) || preg_match('/upgrade/i',$action))
         if ($db->connected)
         {
             $conf->setValues($db);
+            // Reset forced setup after the setValues
+            if (defined('SYSLOG_FILE')) $conf->global->SYSLOG_FILE=constant('SYSLOG_FILE');
+            $conf->global->MAIN_ENABLE_LOG_TO_HTML = 1;
 
             // Define if we need to update the MAIN_VERSION_LAST_UPGRADE value in database
             $tagdatabase=false;
diff --git a/htdocs/install/upgrade2.php b/htdocs/install/upgrade2.php
index 430c6f46c94..6dbcae4cd24 100644
--- a/htdocs/install/upgrade2.php
+++ b/htdocs/install/upgrade2.php
@@ -163,7 +163,13 @@ if (! GETPOST('action','aZ09') || preg_match('/upgrade/i',GETPOST('action','aZ09
     $conf->db->dolibarr_main_db_cryptkey = $dolibarr_main_db_cryptkey;
 
     // Chargement config
-    if (! $error) $conf->setValues($db);
+    if (! $error)
+    {
+    	$conf->setValues($db);
+    	// Reset forced setup after the setValues
+    	if (defined('SYSLOG_FILE')) $conf->global->SYSLOG_FILE=constant('SYSLOG_FILE');
+    	$conf->global->MAIN_ENABLE_LOG_TO_HTML = 1;
+    }
 
 
     /***************************************************************************************