DOCUMENT:Q135524 08-AUG-2001 [winnt] TITLE :Diskeeper Version 1.0 Uninstall Causes Windows NT 3.51 to Hang PRODUCT :Microsoft Windows NT PROD/VER:3.51 OPER/SYS: KEYWORDS:kb3rdparty ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 3.51 - Microsoft Windows NT Server version 3.51 ------------------------------------------------------------------------------- SYMPTOMS ======== If you use the Executive Software Diskeeper 1.0 uninstall feature after you upgrade Windows NT 3.5 to 3.51 and restart your computer, you receive an entry point error in NTDLL.DLL and Windows NT hangs and becomes unbootable. NOTE: Diskeeper for Windows NT is a disk defragmentation program for Windows NT 3.5. CAUSE ===== Diskeeper version 1.0 is not designed to run under Windows NT 3.51. When you install Diskeeper on Windows NT 3.5, Diskeeper replaces the following Windows NT system files with its own versions of these files: NTDLL.DLL, NTOSKRNL.EXE, FASTFAT.SYS, and NTFS.SYS. If you use the Diskeeper uninstall feature after you upgrade to Windows NT 3.51, Diskeeper replaces the Windows NT 3.51 versions of these files with the Windows NT 3.5 versions. These do not work with Windows NT 3.51. RESOLUTION ========== Run the emergency repair disk (ERD) to recover your Windows NT 3.51 boot and system files. Do not run Diskeeper version 1.0 under Windows NT 3.51. To prevent this problem when you upgrade from Windows NT 3.5 to 3.51, uninstall Diskeeper before you start the upgrade. Diskeeper 1.01, which works with windows NT 3.51, is now available from Executive Software from the following locations: Compuserve- GO EXECSOFT wwearthlink.net\execsoft MORE INFORMATION ================ This problem can also occur in NT 4.0 server and workstation. It is strongly recommended that customers read the Product Alert on ExecSoft's web site which is located at http://www.execsoft.com/pas/pa091796.htm. The latest version of Diskeeper is version 2.0 for NT 4.0. For additional information, contact Executive Software at: Executive Software 701 North Brand Blvd., 6th Floor Glendale, California, USA 91203-1242 Technical Support: (818) 547-2050 FAX: (818) 545-8801 Diskeeper is manufactured by Executive Software, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability. Additional query words: prodnt defrag utility defragmenter ====================================================================== Keywords : kb3rdparty Technology : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS351search Version : 3.51 ============================================================================= 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.