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Q96827: VSAFE Err Msg: "…Is Trying to Modify System Memory"

Article: Q96827
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 22-NOV-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 6.0, 6.2, 6.21, 6.22 
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SYMPTOMS
========

Each time you start your computer, you receive an error message stating that the
system memory is being modified.

CAUSE
=====

If you continually receive this error message, either you are running VSAFE with
the /2+ parameter (which checks for programs that load as memory resident), or
one of your programs is causing the error because it does not use the MS-DOS
Interrupt 21 application program interface (API) function to load as memory
resident.

WORKAROUND
==========

To work around this problem, change the VSAFE /2+ parameter to /2-. This
disables the memory check for standard memory-resident programs.

If the warnings continue, note the program that causes the error message. This
program is not using the standard method to load as a memory-resident program
(Int 21h). Once you note which program is causing the problem and verify that it
is not infected with a virus, load VSAFE after that program in the AUTOEXEC.BAT
file.

Additional query words: 6.22 6.00 win31 6.20

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600
Version           : MS-DOS:6.0,6.2,6.21,6.22

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