You may receive an error message on a Windows-based computer: "STOP 0x00000050" or "STOP 0x0000008e"

Symptoms

You may experience one or more of the following symptoms on a Microsoft Windows Server 2003-based, Microsoft Windows XP-based, or Microsoft Windows 2000-based computer:

• The computer automatically restarts.

• After you log on, you receive the following error message:
  

  Microsoft Windows
  The system has recovered from a serious error.
  A log of this error has been created.
  Please tell Microsoft about this problem.
  We have created an error report that you can send to help us improve Microsoft Windows. We will treat this report as confidential and anonymous.
  To see what data this error report contains, click here.

  To see what the error report contains, click click here. When you click the click here link at the bottom of the message box, you will see error signature information that is similar to one of the following data samples.
  
  Data sample 1BCCode : 00000050 BCP1 : f8655000 BCP2 : 00000001 BCP3 : fc7cc465
  BCP4 : 00000000 OSVer : 5_1_2600 SP : 0_0 Product : 256_1 Data sample 2BCCode : 0000008e BCP1 : c0000005 BCP2 : 00000120 BCP3 : fd28eaa4
  BCP4 : 00000000 OSVer : 5_1_2600 SP : 0_0 Product : 256_1

• You receive one of the following "Stop" error messages.
  
  Message 1

  
  A problem has been detected and Windows has been shut down to prevent damage to your computer...
  Technical information:
  
  STOP: 0x00000050 (0xf8655000, 0x00000001, 0xfc7cc465, 0x00000000)
  
  PAGE_FAULT_IN_NONPAGED_AREA (50)

  Message 2

  A problem has been detected and Windows has been shut down to prevent damage to your computer...
  Technical information:
  
  STOP: 0x0000008e (0xc0000005, 0x00000120, 0xfd28eaa4, 0x00000000)
  
  KERNEL_MODE_EXCEPTION_NOT_HANDLED_M (1000008e)

• Error messages that are similar to the following are logged in the System event log:

  Date:
  date
  Source: System
  Error Time:
  time
  Category: (102)
  Type: Error
  Event ID: 1003
  User: N/A
  Computer:
  COMPUTER
  Description: Error code 00000050, parameter1 f8655000, parameter2 00000001, parameter3 fc7cc465, parameter4 00000000. For more information, see Help and Support Center at http://support.microsoft.com. Data: 0000: 53 79 73 74 65 6d 20 45 System E 0008: 72 72 6f 72 20 20 45 72 rror Er 0010: 72 6f 72 20 63 6f 64 65 ror code 0018: 20 30 30 30 30 30 30 35 0000050 0020: 30 20 20 50 61 72 61 6d 0 Param 0028: 65 74 65 72 73 20 66 66 eters ff 0030: 66 66 66 66 64 31 2c
  

  Date:
  date
  Source: System
  Error Time:
  time
  Category: (102)
  Type: Error
  Event ID: 1003
  User: N/A
  Computer:
  COMPUTER
  Description: Error code 0000008e, parameter1 c0000005, parameter2 00000120, parameter3 fd28eaa4, parameter4 00000000. For more information, see Help and Support Center at http://support.microsoft.com. Data: 0000: 53 79 73 74 65 6d 20 45 System E 0008: 72 72 6f 72 20 20 45 72 rror Er 0010: 72 6f 72 20 63 6f 64 65 ror code 0018: 20 30 30 30 30 30 30 35 000008e 0020: 30 20 20 50 61 72 61 6d 0 Param 0028: 65 74 65 72 73 20 66 66 eters ff 0030: 66 66 66 66 64 31 2c
  

Cause

This problem may occur if the computer is infected with a variant of the HaxDoor virus.

The HaxDoor virus creates a hidden process. Additionally, the virus hides files and registry keys. The executable file name of the HaxDoor virus may vary, but the file name is frequently Mszx23.exe. Many variants of this virus put a driver that is named Vdmt16.sys or Vdnt32.sys on the computer. This driver is used to hide the virus process. The HaxDoor virus variants can restore these files if you delete them.

Resolution

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows

To solve this problem, follow these steps:

1. Print the following Microsoft Knowledge Base article. Use the article as a guide to this procedure.
   
   

   307654 How to install and use the Recovery Console in Windows XP
   
   

2. Click Start, click Run, type regedit, and then click OK.

3. Locate the following registry subkey:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify

4. Locate and delete any entries in the registry subkey that reference "drct16" or "draw32".
   
   For example, you may see entries that are similar to the following:
   

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\drct16

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\draw32

5. Insert the Windows XP installation CD, and then restart the computer from the CD.

6. At the Welcome to Setup screen, press R (repair) to start the Windows Recovery Console.

7. Select the number that corresponds to the Windows installation that you want to repair. This number is typically 1.

8. If prompted, type the administrator password. If an administrator password does not exist, press ENTER.

9. At the command prompt, move to the C:\Windows\System32 folder. For example, type cd C:\Windows\System32.

10. Use the ren (rename) command to rename the following files as shown. Remember to press ENTER after each command. If you see a "File not found" message, move to the next file in the list.ren 1.a3d 1.a3d.bad ren cm.dll cm.dll.bad ren cz.dll cz.dll.bad ren draw32.dll draw32.dll.bad ren drct16.dll drct16.dll.bad ren dt163.dt dt163.dt.bad ren fltr.a3d fltr.a3d.bad ren hm.sys hm.sys.bad ren hz.dll hz.dll.bad ren hz.sys hz.sys.bad ren i.a3d i.a3d.bad ren in.a3d in.a3d.bad ren klo5.sys klo5.sys.bad ren klogini.dll klogini.dll.bad ren memlow.sys memlow.sys.bad ren mszx23.exe mszx23.exe.bad ren p2.ini p2.ini.bad ren ps.a3d ps.a3d.bad ren redir.a3d redir.a3d.bad ren tnfl.a3d tnfl.a3d.bad ren vdmt16.sys vdmt16.sys.bad ren vdnt32.sys vdnt32.sys.bad ren w32tm.exe w32tm.exe.bad ren WD.SYS WD.SYS.bad ren winlow.sys winlow.sys.bad ren wmx.a3d wmx.a3d.bad ren wz.dll wz.dll.bad ren wz.sys wz.sys.bad
    If you want to delete these files when you are finished, type del *.bad.

11. Remove the Windows XP installation CD, and then type
    Exit to restart the computer.

12. When the computer restarts, click
    Start, click Run, type regedit, and then click
    OK.

13. Locate and delete the following registry subkeys and any entries that may be present under each subkey. If any registry subkeys from this list are not present, move to the next subkey in the list.
    
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vdmt16
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vdnt32
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\winlow
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\memlow
    
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\vdmt16
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\vdnt32
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\winlow
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\memlow
    
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ENUM\ROOT\LEGACY_VDMT16
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ENUM\ROOT\LEGACY_VDNT32
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ENUM\ROOT\LEGACY_WINLOW
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ENUM\ROOT\LEGACY_MEMLOW

14. Locate and delete any entries that contain the Mszx23.exe file name under the following registry subkeys:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices

15. Quit Registry Editor.

16. Make sure that your antivirus and anti-spyware programs are updated with the latest definitions, and then perform a complete system scan.

The following malware has been identified by antivirus vendors.