Article ID: 110406
Article Last Modified on 11/22/1999
APPLIES TO
- Microsoft MS-DOS 6.2 Standard Edition
This article was previously published under Q110406
SYMPTOMS
MS-DOS 6.2 Step-Up may generate one of the following messages and fail if you try to run it on a system on which the McAfee V-Scan Checksum option /ag or /av has been used:
-or-
CAUSE
The Checksum feature adds either 10 or 52 extra bytes to the size of executable files. The /ag switch adds 52 bytes to executable files and allows validation and recovery of infected files. The /av switch adds 10 bytes to the files and allows a validation check only. Either Checksum option may cause MS-DOS 6.2 Step-Up to fail because Step-Up does not recognize the system and executable files it attempts to update.
RESOLUTION
The /ag option can be reversed by running the following command:
scan /rg
The /av option can be reversed by running the following command:
scan /rv
Disabling Checksum by using the above switches should return the files to their original sizes and allow MS-DOS Step-Up to upgrade the necessary files. If MS-DOS Step-Up still fails, recopy the MS-DOS 6.0 system files from the original MS-DOS 6.0 disks to the bootable partition of the hard disk drive. If this is not successful, a reinstallation of MS-DOS 6.0 may be necessary.
MORE INFORMATION
For more information, contact McAfee Associates.
The McAfee V-Scan is manufactured by McAfee Associates, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance and reliability.
Additional query words: 6.20 Macafee mcaffee v-shield
Keywords: KB110406
