Thanks Yvo. A security vulnerability has been identified that could allow an attacker to compromise a Windows-based computer and gain complete control over it. The attacker would need the ability to log onto the computer to carry out an attack. You can help protect your computer from this specific vulnerability by installing this update from Microsoft.
Operating systems: Windows XP (32-bit & 64-bit), 2000 & NT4 (see MS02-071 for NT4)
Download: Windows WM_TIMER Patch (Windows 2000 - 3747 KB)
Download: Windows WM_TIMER Patch (Windows XP - 4041 KB)
Note: There has been no knowledge base article made for this patch yet.