Microsoft has published a guide about Troubleshooting Stop Errors on Windows Server 2003

When a computer running Microsoft® Windows Server™ 2003 detects an unexpected problem from which it cannot recover, a Stop error occurs. A Stop error serves to protect the integrity of the system by immediately stopping all processing. Although it is theoretically possible for Windows Server 2003 to continue functioning when it detects that a core component has experienced a serious problem, the integrity of the system would be questionable, which could lead to security violations, system corruption, and invalid transaction processing. When a Stop error occurs, Windows Server 2003 displays a Stop message, sometimes referred to as a “blue screen,” which is a text-mode error message that reports information about the condition. A basic understanding of Stop errors and their underlying causes improves your ability to locate and understand technical information or perform diagnostic procedures requested of you by technical support personnel.

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