Anti-Virus for Windows Doesn't Scan Due to Insufficient Memory (97953)

The information in this article applies to:
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22
    Microsoft Windows 3.1
    Microsoft Windows 3.11
    Microsoft Windows for Workgroups 3.1
    Microsoft Windows for Workgroups 3.11

This article was previously published under Q97953


Microsoft Anti-Virus for Windows (MWAV) may report either of the following error messages:
    Insufficient DOS Memory
    Insufficient MS-DOS Memory
    Not Enough Memory
This problem can occur in both standard and 386 enhanced modes.


This problem can be caused by incompatible terminate-and-stay-resident (TSR) programs or by third-party video drivers.


To work around this problem, do the following:

    Use the Interactive Startup feature to start your computer withoutloading unnecessary TSRs. For more information on Interactive Startup, see the "Configuring Your System" chapter in the "User's Guide."
    Run Microsoft Windows Anti-Virus right after you start Microsoft Windows (that is, before you run other applications).
    Try using a video driver provided with Microsoft Windows 3.1 or 3.11, such as the standard VGA video driver.


When Microsoft Anti-Virus requests this memory, the program has to share the 640-kilobyte (K) conventional MS-DOS memory with the Windows kernel and any other terminate-and-stay-resident (TSR) programs loaded prior to running Windows. Windows drivers and other Windows-based applications also use conventional memory. These Windows-based applications, when closed, should free this conventional memory however, some do not.

Modification Type: Major Last Reviewed: 11/19/1999
Keywords: KB97953