Yesterday Microsoft released a reliability update for Windows Server 2003, you should install this microcode update to improve the reliability of systems with intel processors.
The following Intel processors may be affected:
• Mobile: Intel Core 2 Duo mobile processor.
• Desktop: Intel Core 2 Duo desktop processor, Intel Core 2 Quad desktop processor, and Intel Core 2 Extreme processor.
• Server: Intel Xeon processors 3000, 3200, 5100, and 5300 series.
Read more in KB article 936357
