DOCUMENT:Q165748 09-AUG-2001 [winnt] TITLE :How to Disable a Service or Device that Prevents NT from Booting PRODUCT :Microsoft Windows NT PROD/VER:WINDOWS:2000; winnt:3.51,4.0 OPER/SYS: KEYWORDS:kb3rdparty kbenv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation versions 3.51, 4.0 - Microsoft Windows NT Server versions 3.51, 4.0 - Microsoft Windows 2000 Server - Microsoft Windows 2000 Professional ------------------------------------------------------------------------------- SYMPTOMS ======== If a service or device driver is started automatically and is incompatible with the current version of Windows NT, the service or device driver may not allow Windows NT to remain booted long enough for you to shut the service off or disable the outdated device driver. CAUSE ===== This may occur when Windows NT is upgraded to a new version prior to removing or stopping third-party devices or services. RESOLUTION ========== Perform the following steps to resolve this problem: WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk. 1. Install a parallel copy of Windows NT to a different folder on your local hard disk. NOTE: For the procedure and additional information on parallel installation, click the article number below to view the article in the Microsoft Knowledge Base: Q259003 How and Why to Perform a Parallel Installation of Windows NT 4.0 2. Run Regedt32.exe from the newly installed version of Windows NT and go to the following key: HKEY_LOCAL_MACHINE 3. On the Registry menu, click Load Hive, and then open the following registry file in the original Windows NT installation: %SystemRoot%\System32\Config\System Assign it a name other than System (such as "Test") in the next dialog box (the Key Name dialog box). NOTE: The file must be open before the key name is changed. 4. Go to the following registry key and note the value for Current:REG_DWORD (this selects which ControlSet00x to load when booting and is the one that needs modification): HKEY_LOCAL_MACHINE\TEST\Select 5. Perform the following steps to disable a service: a. Go to the following registry key: HKEY_LOCAL_MACHINE\TEST\ControlSet00x\Services \ Where x is the value of Current:REG_DWORD b. Change the value of Start:REG_DWORD: to 0x4. NOTE: Other Valid Services start options are: Automatic 0X2 Manual 0x3 Disabled 0x4 6. Perform the following steps to disable a device driver: a. Go to the following registry key: HKEY_LOCAL_MACHINE\TEST\ControlSet00x\Services \ Where x is the value of Current:REG_DWORD b. Change the value of Start:REG_DWORD: to 0x4. NOTE: Other Valid Services start options are: Boot 0x0 System 0x1 Automatic 0X2 Manual 0x3 Disabled 0x4 c. After you have made the necessary changes, go to the following registry key and then click Unload Hive on the Registry menu: HKEY_LOCAL_MACHINE\TEST d. Exit Registry Editor, exit the parallel version of Windows NT, and then reboot the original version of Windows NT. The service or device that corresponds to the edited key are now disabled. Additional query words: 3.50 ====================================================================== Keywords : kb3rdparty kbenv Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbwin2000Serv kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinNTS351search Version : WINDOWS:2000; winnt:3.51,4.0 ============================================================================= 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.