diff --git a/workflow/engine/controllers/installer.php b/workflow/engine/controllers/installer.php
index 3b2e5da94..6222f97fc 100755
--- a/workflow/engine/controllers/installer.php
+++ b/workflow/engine/controllers/installer.php
@@ -840,10 +840,10 @@ class Installer extends Controller
             $query = sprintf( "USE %s;", $wf_workpace );
             $this->mysqlQuery( $query );
 
-            $query = sprintf( "UPDATE USERS SET USR_USERNAME = '%s', USR_PASSWORD = '%s' WHERE USR_UID = '00000000000000000000000000000001' ", $adminUsername, md5( $adminPassword ) );
+            $query = sprintf( "UPDATE USERS SET USR_USERNAME = '%s', USR_LASTNAME = '%s', USR_PASSWORD = '%s' WHERE USR_UID = '00000000000000000000000000000001' ", $adminUsername, $adminUsername, md5( $adminPassword ) );
             $this->mysqlQuery( $query );
 
-            $query = sprintf( "UPDATE RBAC_USERS SET USR_USERNAME = '%s', USR_PASSWORD = '%s' WHERE USR_UID = '00000000000000000000000000000001' ", $adminUsername, md5( $adminPassword ) );
+            $query = sprintf( "UPDATE RBAC_USERS SET USR_USERNAME = '%s', USR_LASTNAME = '%s', USR_PASSWORD = '%s' WHERE USR_UID = '00000000000000000000000000000001' ", $adminUsername, $adminUsername, md5( $adminPassword ) );
             $this->mysqlQuery( $query );
 
             // Write the paths_installed.php file (contains all the information configured so far)
diff --git a/workflow/engine/templates/users/users.js b/workflow/engine/templates/users/users.js
index e7b496cfd..e816a64a2 100755
--- a/workflow/engine/templates/users/users.js
+++ b/workflow/engine/templates/users/users.js
@@ -409,14 +409,16 @@ Ext.onReady(function () {
           fieldLabel : '<span style=\"color:red;\" ext:qtip="'+ _('ID_FIELD_REQUIRED', _('ID_FIRSTNAME')) +'"> * </span>' + _('ID_FIRSTNAME'),
           xtype      : 'textfield',
           width      : 260,
-          allowBlank : false
+          allowBlank : false,
+          regex      : /^[a-zA-Z]+$/
         },
         {
           id         : 'USR_LASTNAME',
           fieldLabel : '<span style=\"color:red;\" ext:qtip="'+ _('ID_FIELD_REQUIRED', _('ID_LASTNAME')) +'"> * </span>' + _('ID_LASTNAME'),
           xtype      : 'textfield',
           width      : 260,
-          allowBlank : false
+          allowBlank : false,
+          regex      : /^[a-zA-Z]+$/
         },
         {
           id         : 'USR_USERNAME',
@@ -463,7 +465,7 @@ Ext.onReady(function () {
           vtype      : 'email',
           xtype      : 'textfield',
           width      : 260,
-          allowBlank : false
+          allowBlank : false,
         },
         {
           xtype          : 'textarea',