AST RESEARCH, INC.        TECHNICAL BULLETIN # 1653          01/08/97 
 
 
 
TITLE:  Login Problems with Windows NT, v3.5x
 
 
ISSUE 
 
   If Service Pack 4 or 5 was installed previous to upgrading from 1 
   to 2 CPUs, or downgrading from 2 to 1 CPUs, or Restoring an 
   initial configuration via the Repair Disk, then one of the 
   following Logon error messages may appear:
   
   * The system cannot log you on [80000005]
     Please try again or consult your system administrator.
   
   * Unable to log you on because the netlogon service
     failed to start.
   
   * The system cannot log you on [C0000037]. Please try   
     again or consult your system administrator.
   
   * The From drop-down list box is blank. No computer or   
     domain name appears.
   
   This issue affects all multi processor systems except the 
   Manhattan SMP.    

 
BACKGROUND 
 
   After you install Windows NT 3.51 Service Pack 4 or 5, the SAM 
   and Security database hives are updated to a new format. This new 
   format requires the new SAMSRV.DLL that ships with Service Pack 4 
   and 5, and it is not backward- compatible with the earlier 
   versions of SAMSRV.DLL.
   
   The following is an important notice included in the Readme.txt 
   of the Windows NT 3.51 Service Pack 4:
   
   When using the Windows NT Emergency Repair Disk to repair your 
   Windows NT system after applying the Service Pack, do not repair 
   the file SAMSRV.DLL. If it is necessary to repair this file 
   because it has become corrupt, you must replace it with the 
   Service Pack version of the file.
   
   This is necessary because the Service Pack update process changes 
   the user database, and the Service Pack version of SAMSRV.DLL is 
   needed to allow the system to function properly.    

 
ACTION 
 
   To correct this problem, do one of the following:
   
   1. If Windows NT is installed on a FAT partition, replace 
      SAMSRV.DLL in the %SystemRoot%\System32 directory with 
      the SAMSRV.DLL in Service Pack 4.
   
      OR
   
   2. If Windows NT is installed on an NTFS partition, 
      re-install Windows NT to a separate directory. Log on 
      as the same user with same permissions and relace 
      SAMSRV.DLL in the %SystemRoot%\System32 directory with
      the SAMSRV.DLL in the Service Pack 4.
   
      OR
   
   3. Restore the SAM and SECURITY database system hives 
      from the last Windows NT Backup performed prior to the 
      installation of Windows NT Service Pack 4. This 
      restores the SAM and Security databases to the format 
      prior to the update of Service Pack 4. This format is 
      compatible with the original Windows NT 3.51 (Build 
      1057) system files.
   
   WARNING: This procedure may result in loss of any new users, 
   groups and trust relationships created since the previous backup. 
   You should only follow this procedure as the last resort.
   
      OR
   
   Modify the contents of the emergency repair disk (ERD) by doing 
   the following:
   
   1. Remove the attributes from the SETUP.LOG file by 
      typing the following at the commandline:
   
         attrib -r -h -s a:\SETUP.LOG
   
   2. In Setup.log, add the following line to the 
      files .WinNt section:
   
        \%SystemRoot%\System32\Samsrv.dll =  
       "samsrv.dll","316d3","\", (continued line) "nt351 
        repair disk","samsrv.dll"
   
   3. Copy SAMSRV.DLL from the Windows NT 3.51 Service Pack 
      4 source media to the root directory of the ERD.
   
   4. Restart your computer with the three Windows NT 3.51 
      Setup disks.
   
   5. Select R to Repair your Windows NT.
   
   6. Select only "Verify Windows NT System Files" and 
      continue.
   
   7. If prompted to insert Windows NT setup disk #4, press 
      the [ESC] key to continue with the Repair process.
   
   8. After you replace SAMSRV.DLL with the file from 
      Windows NT 3.51 Service Pack 4, press the [F4] key to 
      exit Repair. Reboot the computer and restart Windows 
      NT.    

 
NOTES 
 
   N/A    

 
TAN TPR 3200AC 
 
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