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- MDISK - Boot Virus Remover
-
- McAfee Associates
- 4423 Cheeney Street
- Santa Clara, CA 95054-0253
- (408) 988-3832 - voice
- (408) 988-4004 - BBS
- (408) 970-9727 - FAX
-
-
- * * * * W A R N I N G * * * *
-
- Do not attempt to use these programs until you have
- contacted McAfee Associates at 408 988 3832. These
- programs can cause damage to your disks, and instructions
- for the use of these programs use may vary depending on the
- type of virus that you have contracted.
-
-
- Introduction:
-
- MDISK Programs are utilities designed to remove generic boot
- sector or partition table viruses such as the Pakistani Brain, Den
- Zuk, Bouncing Dot, Stoned, Alameda or any other boot/partition
- virus. It will remove these viruses from any bootable disk,
- including floppies, and will return the system to an uninfected
- state. Note that you must use the appropriate MDISK program for
- the version of DOS that your system was originally formatted under.
-
- The MDISK programs are:
-
- MD40.EXE for MS/PC DOS 4.0/4.01
- MD33.EXE for MS/PC DOS 3.3
- MD32.EXE for MS/PC DOS 3.2
- MD30.EXE for MS/PC DOS 3.0/3.1
-
-
- Use:
-
- MDISK provides three options:
-
- MDxx [Default] This option will cause the partition
- table and the DOS boot sector of the bootable
- hard disk to be disinfected.
-
- MDxx F This option is used for disinfecting floppies.
- It will disinfect the diskette placed in the
- boot floppy drive (first configured drive in
- the system).
-
- MDxx P This option will cause only the partition table
- of the bootable hard disk (first configured
- hard drive) to be disinfected. The fixed disk
- DOS boot sector will be ignored,
-
-
- To disinfect an infected system, first power down the machine
- and then boot from a clean, write protected floppy. Then type the
- appropriate MDISK command. If you are disinfecting a hard disk,
- power down the system again immediately after running MDISK, and
- then re-boot from the hard disk. This will circumvent the
- possibility of the virus surviving in system memory.
-
- Cautions:
-
- MDISK should only be used on systems in which a boot or
- partition infection has been confirmed. To confirm an infection,
- run the VIRUSCAN program to determine the type of virus. VIRUSCAN
- may be obtained from the McAfee Associate's BBS - 408 988 4004.
- Using MDISK will incur a slight chance of boot sector damage (less
- than 2%) on systems that are infected or uninfected, and the result
- could be a hard disk that is no longer bootable. If this occurs,
- the DOS SYS command must be used to restore the bootable status
- (see the DOS Users Manual). MDISK may also leave remnants of
- virus code in unaccessible sectors. These remnants are harmless
- and will no longer be accessible after MDISK is run. However, some
- small amount of space (usually less than 3K) may be wasted on the
- hard disk as a result of running MDISK.
-
- License:
-
- The MDISK programs are shareware products produced by McAfee
- Associates. They may be registered for $25.00US by individual PC
- users. Businesses, organizations, government agencies, and educational
- institutions must obtain a license for use. Please send shareware
- registration fees and requests for site license information to:
-
- McAfee Associates
- 4423 Cheeney Street
- Santa Clara, CA 95054-0253
-
-