DOCUMENT:Q187704 10-AUG-2001 [winnt] TITLE :Server Lockup Receiving Pop-up Messages with Backup Exec PRODUCT :Microsoft Windows NT PROD/VER::4.0,4.0a OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft BackOffice Small Business Server versions 4.0, 4.0a ------------------------------------------------------------------------------- SYMPTOMS ======== When a pop-up message is received from Backup Exec 7.0 build 719 that is installed on Windows NT Server 4.0, the access to the CPU is blocked, except for critical processes necessary to keep the computer running Windows NT running. Some or all applications may quit responding until the message box is closed. The server may become completely unresponsive on the network while in this state. NOTE: This behavior has only been seen in Backup Exec 7.0 Build 719. CAUSE ===== Seagate Technical Support reports that Build 719 of Backup Exec for Windows NT Server 7.0 makes a change to the registry that causes this behavior. The registry change is required in order for Backup Exec to work on Small Business Server (SBS). This change, however, causes problems on Windows NT 4.0 Server. At this time, the installation program of Build 719 does not check to see if the version of the OS is Windows NT Server or BackOffice SBS. The registry subkey changed is: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager \SubSystems\Windows NOTE: The above registry key is one path; it has been wrapped for readability. The entry before installing Backup Exec 7.0 Build 719 is: %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads=16 The entry after installing Backup Exec 7.0 Build 719 is: %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows SharedSection=1024,3072,512 Windows=On SubSystemType=Windows ServerDll=basesrv,1 ServerDll=winsrv:UserServerDllInitialization,3 ServerDll=winsrv:ConServerDllInitialization,2 ProfileControl=Off MaxRequestThreads RESOLUTION ========== On Windows NT Server 4.0, add the "=16" value back to the MaxRequestThreads section. Do not make this change on Small Business Server. MORE INFORMATION ================ Build 719 removes the "=16" from MaxRequestThreads=16. Also note that Backup Exec implements the change indicated in the following article by adding ",512" after the SharedSection: For additional information, please see the following article in the Microsoft Knowledge Base: ARTICLE-ID: Q142676 TITLE : Overcoming User32.dll Initialization Failure Errors For information on Backup Exec, see the following Web site: http://www.veritas.com (http://www.veritas.com) The third-party products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: hang hangs hung frozen freeze non-responsive ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbAudDeveloper kbSBServSearch kbSBServ400 kbSBServ400a Version : :4.0,4.0a Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.