DOCUMENT:Q86027 27-SEP-1999 [win95x] TITLE :Err Msg: Cannot Start Windows in Standard Mode (Low Memory) PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:WINDOWS:3.1,3.11 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows versions 3.1, 3.11 ------------------------------------------------------------------------------- SYMPTOMS ======== Microsoft Windows may display the following error messages when available XMS memory is below the requirement for standard mode and a UMB provider (for example, EMM386.EXE) is loaded in the CONFIG.SYS file: Cannot Start Windows in Standard Mode Make sure you are not running other protected-mode software or try starting Windows in 386 Enhanced mode by typing WIN /3. After typing "win /3" (without the quotation marks), the following message is displayed: Insufficient extended memory available to run Windows Quit one or more applications to increase available memory or restart your computer. CAUSE ===== Standard mode Windows 3.1 is VCPI-compliant. VCPI is an industry protocol to allow 386-based memory managers such as EMM386 to coexist with 286- protected mode MS-DOS extenders. However, under low-memory situations where available XMS is less than the Windows 3.1 standard mode requirement, UMB providers (for example, EMM386) cause Windows to generate the above error message. Specifically with MS-DOS or the Windows 3.1 EMM386, the error message only appears with the NOEMS switch (and DOS=UMB). When EMM386 is loaded with either the RAM switch (to also provide expanded memory) or with no switch (to only provide expanded memory), Windows 3.1 will execute in standard mode. To avoid this (low memory) error message, Windows will need more available XMS memory. If drivers for an external disk cache and/or RAMDrive are loaded, either reduce the extended memory allocated to these drivers or remove them entirely. Additional query words: 3.10 3.11 err msg ====================================================================== Keywords : Technology : kbWin3xSearch kbZNotKeyword3 kbWin310 kbWin311 Version : WINDOWS:3.1,3.11 ============================================================================= 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 1999.