Microsoft KB Archive/168132

= Windows NT reports a single processor after you apply a service pack =

Article ID: 168132

Article Last Modified on 11/1/2006

-

APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0, Terminal Server Edition

-



This article was previously published under Q168132



SYMPTOMS
After you apply a Windows NT service pack on a multiprocessor system, you find that Windows NT now only reports a single processor installed.

Prior to installing the service pack, you were running with multiprocessor versions of the Hal.dll and Ntoskrnl.exe files.

Applying a Windows NT service pack on a multi-processor computer may cause the computer to stop responding (hang) on reboot immediately after the installation. This may occur during the logon sequence and can appear to be a service or device failure.



CAUSE
When Windows NT was originally installed on the computer, it may have contained only a single processor and later had a hardware upgrade to multiple processors.

On Compaq computers, you can upgrade Windows NT to support multiple processors by using the Compaq Software Support Diskette (SSD) and Choosing the Multiprocessor support option. This installs the necessary files to support multiprocessors.

Alternately, the Windows NT Resource Kit utility called Uptomp.exe allows you to upgrade Windows NT to support multiprocessors.

The problem is that neither of these 2 utilities, Compaq SSD or the Windows NT 3.5x Uptomp.exe utility, update the Setup.log file found in the %SystemRoot%\Repair directory.



Note The "Windows NT 4.0 Resource Kit" does correctly update the Setup.log file.

The Setup.log was created when Windows NT was first installed and contains information about the files copied to your system during Windows NT setup. Consequently, the file reflects the information for a single processor computer. When service packs are installed, the Setup.log file is parsed looking for the correct Hal.dll and Ntoskrnl.exe to replace. Because the Setup.log shows single processor components, the service pack Update.exe program replaces the multiprocessor files with single processor files (thus taking you back to the single processor environment). Furthermore, additional support files are different between single and multiprocessor computers.



RESOLUTION
By modifying the %SystemRoot%\Repair\Setup.log file, you can tell the service pack Update.exe program to load the correct multiprocessor components (thus taking you back to multiprocessor support and at the same time ensuring that future service packs install correctly).

Steps to fix the Setup.log and restore your system to multiprocessors:  Remove the read only and hidden attributes on the %SystemRoot%\Repair\Setup.log file. Make a backup copy of the %SystemRoot%\Repair\Setup.log. Open the Setup.log using notepad.  Search for and modify the following lines, being careful to use the correct operating system version section and proper HAL for your computer type:    HALSP.DLL = For Compaq Systempro, Systempro/XL, ProLiant 2000, 4000, and 4500 systems only.

HALMPS.DLL = Multiprocessor HAL for APIC support and for the Compaq ProLiant 1500 and 5000

Windows NT 3.5
Modify the entries under [Files.WinNt] section to the following: \<%SystemRoot%>\System32\Ntoskrnl.exe = "NTKRNLMP.EXE","bc81d" \<%SystemRoot%>\System32\Kernel32.dll = "KERNEL32.DLL","65c96" \<%SystemRoot%>\System32\Winsrv.dll = "WINSRV.DLL","1ac2a1" \<%SystemRoot%>\System32\Ntdll.dll = "NTDLL.DLL","47eca" Then select one of the following HALs and modify the line. \<%SystemRoot%>\System32\hal.dll = "HALSP.DLL","15d8d" \<%SystemRoot%>\System32\hal.dll = "HALMPS.DLL","1b729" Note %SystemRoot% represents the directory name where Windows NT is installed.

Windows NT 3.51
Modify the entries under [Files.WinNt] section to the following: <pre class="fixed_text">\<%SystemRoot%>\System32\Ntoskrnl.exe = "NTKRNLMP.EXE","cb271" \<%SystemRoot%>\System32\Kernel32.dll = "KERNEL32.DLL","5d99a" \<%SystemRoot%>\System32\Winsrv.dll = "WINSRV.DLL","155a67" \<%SystemRoot%>\System32\Ntdll.dll = "NTDLL.DLL","5830f" Then select one of the following HALs and modify the line. <pre class="fixed_text">\<%SystemRoot%>\System32\hal.dll = "HALSP.DLL","1905a" \<%SystemRoot%>\System32\hal.dll = "HALMPS.DLL","18039" Note %SystemRoot% represents the directory name where Windows NT is installed.

Windows NT 4.0
Modify the entries under [Files.WinNt] section to the following: <pre class="fixed_text">\<%SystemRoot%>\System32\Ntoskrnl.exe = "NTKRNLMP.EXE","e76ab" \<%SystemRoot%>\System32\Kernel32.dll = "KERNEL32.DLL","5b7f8" \<%SystemRoot%>\System32\Winsrv.dll = "WINSRV.DLL","37b4e" \<%SystemRoot%>\System32\Ntdll.dll = "NTDLL.DLL","59c19" \<%SystemRoot%>\System32\win32k.sys = "WIN32K.SYS","132603" Then, select one of the following HALs and modify the line: <pre class="fixed_text">\<%SystemRoot%>\System32\hal.dll = "HALSP.DLL","0f337" \<%SystemRoot%>\System32\hal.dll = "HALMPS.DLL","1a01c" Note %SystemRoot% represents the directory name where Windows NT is installed.

Windows NT 4.0 Terminal Server Edition
Modify the entries under [Files.WinNt] section to the following: <pre class="fixed_text">\<%SystemRoot%>\System32\Ntoskrnl.exe = "NTKRNLMP.EXE","fe754" \<%SystemRoot%>\System32\Kernel32.dll = "KERNEL32.DLL","700ee" \<%SystemRoot%>\System32\Winsrv.dll = "WINSRV.DLL","3e526" \<%SystemRoot%>\System32\Ntdll.dll = "NTDLL.DLL","62b31" \<%SystemRoot%>\System32\win32k.sys = "WIN32K.SYS","140e95" Then select one of the following HALs and modify the line: <pre class="fixed_text">\<%SystemRoot%>\System32\hal.dll = "HALSP.DLL","15a34" \<%SystemRoot%>\System32\hal.dll = "HALMPS.DLL","1a062" Note %SystemRoot% represents the directory name where Windows NT is installed. </li> Save the modified Setup.log to the %SystemRoot%\Repair directory.</li> Reapply the service pack to take you back to MPS support.</li></ol>

<div class="moreinformation_section">

MORE INFORMATION
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

124541 Use Uptomp.exe to upgrade single-processor to multiprocessor

156612 Using Windows NT 3.5x Uptomp.exe to upgrade Windows NT 4.0 systems to multiprocessor

148245 Upgrading from uni- to multi-processor requires service pack

Additional query words: C0000249 sp1 sp2 sp3 sp4 sp5 ntmp 0xC0000249

Keywords: kbsetup KB168132

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.