The computer stops responding when you use the Hot Add Memory feature to add RAM in Windows Server 2003 with Service Pack 1

Consider the following scenario:

�	You use a computer that has a 64-bit chip set.
�	The computer is running a 32-bit version of Microsoft Windows Server 2003 with Service Pack 1 (SP1).
�	The computer has less than 4 gigabytes (GB) of memory.
�	You use the Hot Add Memory feature to add random access memory (RAM) to the computer.
�	After you add RAM, the total amount of RAM is equal to or larger than 4 GB.

In this scenario, the computer stops responding. For example, when you use the Hot Add Memory feature to add 2 GB of RAM to a computer that already has 2 GB of RAM, the computer may stop responding. When this problem occurs, you may receive a "Stop 0x0000007F" error message.

This problem occurs because Windows Server 2003 with SP1 cannot use double buffering for direct memory access (DMA) RAM on 32-bit devices.

To work around this problem, make sure that you have at least 4 GB of RAM before you try to use the Hot Add Memory feature. Or, make sure that your devices are not limited to 32-bit DMA RAM.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.