The UserDump tool (Userdump.exe), also known as User-Mode Process Dump, can create user-mode dump files.
UserDump and its documentation are part of the OEM Support Tools package.
To download these tools, go to Knowledge Base Article Q253066 and follow the instructions on that page.
The default postmortem setting is for a dump file to be written by Dr. Watson. For details on how to alter this, see Enabling Postmortem Debugging.
1