DOCUMENT:Q156655 TITLE :Memory Leak and STOP Screens Using Intermediate NDIS Drivers PRODUCT :Microsoft Windows NT PROD/VER:4.00 OPER/SYS:WINDOWS KEYWORDS:kbbug4.00 kbfile kbfix4.00 kbnetwork ntnetserv NTSrvWkst -------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 -------------------------------------------------------------------------- SYMPTOMS ======== When intermediate (layered) NDIS miniport drivers are in use on Windows NT 4.0, you may experience one or both of the following: - A memory leak in kernel non-paged pool memory. Over time, memory may be depleted to the point where system stability is compromised. - You may receive the following blue-screen STOP error message with parameters that indicate the bad instruction is in the Ndis.sys driver: STOP: 0x0000000A (0x00000014, 0x00000002, 0x00000000, 0xFCBA1062). IRQL_NOT_LESS_OR_EQUAL (* Address fcba1062 has base at fcb95000 - NDIS.SYS) CAUSE ===== Intermediate drivers are typically add-ons that layer themselves over hardware drivers as a filter to provide additional functionality, such as data encryption or other value added services. The Ndis.sys driver included in Windows NT 4.0 has been found to have some deficiencies when such intermediate drivers are used. RESOLUTION ========== You can work around this problem by removing any unnecessary filter drivers. To resolve this problem, obtain the hotfix below, or wait for the next service pack. NOTE: Service Pack 3 must be applied to Windows NT 4.0 prior to applying this fix. This hotfix has been posted to the following Internet location: ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/chp/NT40/ hotfixes-postSP3/ndis-fix STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information. Additional query words: 4.00 bug trap ============================================================================ 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.