Drupal Admin Menu Doesn't Work in IE 7

Admin Menu won't drop-down in IE 7

You'll need to patch your admin_menu.module with this patch.  To learn how to patch Drupal files in Windows read our article on patching Drupal modules in Windows.

The other Admin Menu issue that is resolved via a patch is the access control issue - that is, by default no one but user 1 can access the Admin Menu.  Read our article entitled Drupal's Admin Menu access control for the patch to resolve this issue.