This is from a POST 1.55 daily build.

If I type net stop mongodb from the command line I get:
System error 109 has occurred.

The pipe has been ended.

The log says this:
[websvr] Sun Jul 18 01:12:18 Listener: accept() returns -1 errno:10038 An operation was attempted on something that is not a socket.

The long version of what I did.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>mongod --reinstall --logpath "c:\data\logs\mongo.log"
all output going to: c:\data\logs\mongo.log
Deleting service MongoDB.
Service deleted successfully.
Creating service MongoDB.
Service creation successful.
Service can be started from the command line via 'net start "MongoDB"'.
Sun Jul 18 01:11:45 dbexit:
Sun Jul 18 01:11:45 closeAllFiles() finished
Sun Jul 18 01:11:45 dbexit: really exiting now

C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>
C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>
C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>net start mongodb

The Mongo DB service was started successfully.

C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>net stop mongodb
System error 109 has occurred.

The pipe has been ended.

C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>type c:\data\logs\mongo.log
Sun Jul 18 01:12:12 MongoDB starting : pid=11724 port=27017 dbpath=/data/db/ 64-bit
Sun Jul 18 01:12:12 db version v1.5.6-pre-, pdfile version 4.5
Sun Jul 18 01:12:12 git version: 2d0ed7733a13646d9f644aac0adcdccbfbf6ce1a
Sun Jul 18 01:12:12 sys info: windows (6, 1, 7600, 2, '') BOOST_LIB_VERSION=1_42
[initandlisten] Sun Jul 18 01:12:13 waiting for connections on port 27017
[websvr] Sun Jul 18 01:12:13 web admin interface listening on port 28017
Sun Jul 18 01:12:18 shutdown: going to close listening sockets...
Sun Jul 18 01:12:18 going to close listening socket: 272
Sun Jul 18 01:12:18 going to close listening socket: 284
Sun Jul 18 01:12:18 shutdown: going to flush oplog...
Sun Jul 18 01:12:18 shutdown: going to close sockets...
Sun Jul 18 01:12:18 shutdown: waiting for fs preallocator...
Sun Jul 18 01:12:18 shutdown: closing all files...
[initandlisten] Sun Jul 18 01:12:18 Listener: accept() returns -1 errno:10038 An operation was attempted on something that is not a socket.

[initandlisten] Sun Jul 18 01:12:18 select() failure: ret=-1 errno:10038 An operation was attempted on something that is not a socket.

[initandlisten] Sun Jul 18 01:12:18 now exiting
[initandlisten] Sun Jul 18 01:12:18 shutdown: going to close listening sockets...
[initandlisten] Sun Jul 18 01:12:18 shutdown: going to flush oplog...
[initandlisten] Sun Jul 18 01:12:18 shutdown: going to close sockets...
[initandlisten] Sun Jul 18 01:12:18 shutdown: waiting for fs preallocator...
[initandlisten] Sun Jul 18 01:12:18 shutdown: closing all files...
[websvr] Sun Jul 18 01:12:18 Listener: accept() returns -1 errno:10038 An operation was attempted on something that is not a socket.

C:\Program Files\10gen\mongodb-win32-x86_64-2010-07-17\bin>