DOCUMENT:Q162837  09-AUG-2001  [winnt]
TITLE   :Replacing TCP/IP After SP2 Causes STOP 0x00000050
PRODUCT :Microsoft Windows NT
PROD/VER:4.0
OPER/SYS:
KEYWORDS:kbnetwork

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The information in this article applies to:

 - Microsoft Windows NT Workstation version 4.0 
 - Microsoft Windows NT Server version 4.0 
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SYMPTOMS
========

On a Windows NT 4.0 computer that previously had Service Pack 2 (SP2) installed,
if you remove the TCP/IP protocol, and then later add TCP/IP to the system, when
you boot the computer, you receive the following STOP error:

   STOP 0x00000050 (0xFF10c004, 0x0, 0x0, 0x0) PAGE_FAULT_IN_NONPAGED_AREA

-or-

   STOP 0x00000050 (0xFF404004, 0x0, 0x0, 0x0) PAGE_FAULT_IN_NONPAGED_AREA

-or-

   STOP 0x00000050 (0xA0133004, 0x0, 0x0, 0x0) PAGE_FAULT_IN_NONPAGED_AREA

NOTE: The first argument may change but the STOP code (0x00000050) is the same in
all error messages.

CAUSE
=====

This error only occurs if Remote Access Service is installed and is configured
to use the TCP/IP protocol as either a dial-in or a dial-out protocol.

WORKAROUND
==========

To work around this problem, after adding the TCP/IP protocol back to the
system, do one of the following:

 - Reapply SP2 after adding the TCP/IP protocol back to the system, but before
   rebooting the computer. Click No when you are prompted to reboot, after
   adding TCP/IP.

   -or-

 - After adding the TCP/IP protocol, disable TCP/IP from your RAS configuration
   and allow the Windows NT computer to reboot. After the computer reboots,
   reapply SP2 and enable TCP/IP through RAS.

To recover from this error, use the method appropriate to your situation.

Method 1: Windows NT Is on a FAT Partition
------------------------------------------

If Windows NT is installed on a FAT partition, boot the computer to another
operating system (such as MS-DOS, Microsoft Windows 95, or Microsoft Windows
3.x). Replace the Tcpip.sys file in the \Winnt\System32\Drivers folder with the
one from Service Pack 2.

Method 2: Windows NT Is on an NTFS Partition
--------------------------------------------

If Windows NT is installed on an NTFS partition, install a parallel copy of
Windows NT 4.0 in a new directory. Replace the Tcpip.sys file in the
\Winnt\System32\Drivers folder with the one from Service Pack 2. Reboot to the
original Windows NT installation, and then reapply Service Pack 2. When you are
done, delete the parallel installation of Windows NT 4.0.


STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This
problem was corrected in the latest Windows NT 4.0 U.S. Service Pack. For
information on obtaining the Service Pack, query on the following word in the
Microsoft Knowledge Base (without the spaces):

   S E R V P A C K


Additional query words: crash hang blue screen bluescreen 0X50

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Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400
Version           : 4.0

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