As part of its regularly scheduled monthly security patch release, Microsoft has posted just one security patch for May, far fewer than the 18 patches the company shipped in April. This month's patch is rated important and applies to the Windows Explorer Web View feature in Windows 2000 Service Pack 4 (SP4) and SP3. Windows Server 2003 and Windows XP systems are unaffected. Important is Microsoft's second-highest security rating, behind critical. Users interested in downloading the patch can visit Windows Update or the Microsoft security Web site.