=== modified file 'modules/user.module'
--- modules/user.module	
+++ modules/user.module	
@@ -1329,7 +1329,7 @@ function user_edit($category = 'account'
   $account = user_load(array('uid' => arg(1)));
   $edit = $_POST['op'] ? $_POST['edit'] : (array)$account;
 
-  if (arg(2) == 'delete') {
+  if ((arg(2) == 'delete') && ($account->uid > 1)) {
     if ($edit['confirm']) {
       db_query('DELETE FROM {users} WHERE uid = %d', $account->uid);
       db_query('DELETE FROM {sessions} WHERE uid = %d', $account->uid);
@@ -1357,7 +1357,7 @@ function user_edit($category = 'account'
   $form['_category'] = array('#type' => 'value', '#value' => $category);
   $form['_account'] = array('#type' => 'value', '#value' => $account);
   $form['submit'] = array('#type' => 'submit', '#value' => t('Submit'), '#weight' => 30);
-  if (user_access('administer users')) {
+  if (user_access('administer users') && ($account->uid > 1)) {
     $form['delete'] = array('#type' => 'submit', '#value' => t('Delete'), '#weight' => 31);
   }
   $form['#attributes'] = array('enctype' => 'multipart/form-data');