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2. AIDS (computer virus) - Wikipedia

   en.wikipedia.org/wiki/AIDS_(computer_virus)

   AIDS II works by first finding an uninfected EXE file in the working directory and then creating a companion COM file with the viral code. The COM files will always be 8,064 bytes in length, with a timestamp corresponding to the time of infection. After creating the new COM file, the virus then plays a loud note, and displays the following ...

3. AIDS (Trojan horse) - Wikipedia

   en.wikipedia.org/wiki/AIDS_(Trojan_horse)

   AIDS replaces the AUTOEXEC.BAT file, which would then be used by AIDS to count the number of times the computer has booted. Once this boot count reaches 90, AIDS hides directories and encrypts the names of all files on drive C: (rendering the system unusable), at which time the user is asked to 'renew the license' and contact PC Cyborg Corporation for payment (which would involve sending US ...

4. Configuration file - Wikipedia

   en.wikipedia.org/wiki/Configuration_file

   MS-DOS itself primarily relied on just one configuration file, CONFIG.SYS.This was a plain text file with simple key–value pairs (e.g. DEVICEHIGH=C:\DOS\ANSI.SYS) until MS-DOS 6, which introduced an INI-file style format.

5. Terminate-and-stay-resident program - Wikipedia

   en.wikipedia.org/wiki/Terminate-and-Stay...

   A terminate-and-stay-resident program (commonly TSR) is a computer program running under DOS that uses a system call to return control to DOS as though it has finished, but remains in computer memory so it can be reactivated later. [1] This technique partially overcame DOS's limitation of executing only one program, or task, at a time.

6. List of DOS system files - Wikipedia

   en.wikipedia.org/wiki/List_of_DOS_system_files

   MS-DOS / PC DOS and some related disk operating systems use the files mentioned here. System Files: [1] IO.SYS (or IBMBIO.COM): This contains the system initialization code and builtin device drivers; MSDOS.SYS (or IBMDOS.COM): This contains the DOS kernel. Command-line interpreter (Shell): COMMAND.COM: This is the command interpreter.

7. Abraxas (computer virus) - Wikipedia

   en.wikipedia.org/wiki/Abraxas_(computer_virus)

   The file's date and time in the DOS disk directory listing will be set to the system date and time when infection occurred. The following text strings can be found within the viral code in all Abraxas infected programs: a Screenshot of the Computer virus saying ABRAXAS "*.exe c:\dos\dosshell.com .. MS-DOS (c)1992" "->>ABRAXAS-5<<--"