DOCUMENT:Q99486 30-JUL-2001 [win95x] TITLE :SYSTEM.INI Setting Needed for MS-DOS Box in Windows PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER: OPER/SYS: KEYWORDS: ====================================================================== SUMMARY ======= Sometimes when you are running Windows 3.1 in standard mode on top of LAN Manager and you try to start an MS-DOS box, the screen switches to black, then back to Windows, then displays this dialog box: The Switch has been Prevented Cannot Start Application Exiting Windows and restarting can clear this problem, or you can fix it by finding the NonWindowsApp header of your SYSTEM.INI and inserting the following line: TaskSwitchInt6f=OFF Additional query words: 2.00 2.0 2.10 2.1 2.10a 2.1a 2.20 2.2 ====================================================================== Keywords : ============================================================================= 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.