This article was previously published under Q139281
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One of the following STOP messages appears on multiprocessor computersunder heavy Windows NT usage:
The problem occurs due to a very slight window in AFD.SYS that causesa Memory Descriptor List (MDL) entry to be overwritten.
Microsoft has modified the file, AFD.SYS, to correct this problem.Upgrade to the latest Windows NT 3.51 U.S. Service Pack.
Microsoft has confirmed this to be a problem in Windows NT version 3.51.This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack.For information on obtaining the Service Pack, query on the following wordin the Microsoft Knowledge Base (without the spaces):