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Text File | 1988-04-28 | 3.9 KB | 95 lines | [TEXT/ttxt] |
- Virus Rx Instructions
-
- This Article Last Reviewed: 25 April 1988
-
- How to Use Virus Rx
- 1988, Apple Computer, Inc.
-
- Run Virus Rx from a locked floppy disk.
-
- Virus Rx will list damaged applications, INIT, cdev and RDEV files, invisible
- files, altered system files, and altered applications. Use the scroll bar to
- read the entire list in the Virus Rx window. Virus Rx reports different levels
- of concern, from simple comments to "dangerous" to "fatal."
-
- Virus Rx first lists damaged applications. Damaged applications have not been
- infected by the virus, but they will not work and should probably be removed
- from your disk.
-
- The program next lists all INIT, cdev, and RDEV files (such as the Easy Access,
- Mouse or AppleShare files) in your System Folder. Many of these are common,
- but you should make sure you know why they are on your disks.
-
- Some files are normally invisible; Virus Rx checks these and lists them.
-
- When Virus Rx says "***** Dangerous - ":
-
- If you have an invisible file named "Scores" or "Desktop" _IN_ your
- System Folder, Virus Rx will list them as dangerous indicating you very likely
- have a problem.
-
- When the program reports "altered System files" or "altered
- applications," it lists files which are possible carriers of the virus.
- Replace these programs with copies from original master disks.
-
- When Virus Rx says "***** FATAL - ":
-
- If you receive a "Fatal" message, applications or your system may be
- corrupted when you run them. You should reboot from a locked startup disk and:
-
- 1. Backup your data files (ONLY data files, no applications).
- 2. Erase the infected disk.
- 3. Restore the system files and your applications from original
- master disks.
- 4. Restore your data files.
- 5. Use Virus Rx to check other disks you've used recently.
-
- ___________________________________________________________
-
- Protecting yourself and your users from software viruses
-
- Basic Rules:
-
- 1. Software to be distributed through a BBS should _always_ be inspected and
- tested by the Sysop before making it available for downloading. Sysops should
- never assume users have the expertise needed to protect their systems.
-
- 2. Any of downloaded or unfamiliar, non-commercial software should be kept on
- a floppy disk until its quality and character are determined. Don't put it on
- your hard disk.
-
- 3. Viruses may not always show up immediately, and they may spread or install
- themselves anywhere in your system, so any piece of non-commercial software
- should be tested several times before putting it on your hard disk or exposing
- other application or system disks to it.
-
- A basic method for testing unknown software:
-
- Boot your Macintosh from a floppy disk.
-
- If you have an internal hard disk, unmount it (by dragging its icon into
- the trash) before running the downloaded software. External hard disks should
- be turned off.
-
- Using the Finder's Get Info or Print Catalog menu items, note the sizes of
- your operating system and related files. The size of the system changes when
- you add or remove fonts, desk accessories or other resources, otherwise it
- should generally remain constant. Some files, like the Scrapbook or Notepad
- files, change sizes as often as you use them.
-
- Put the unknown software and a familiar application on a floppy disk.
-
- Run the unknown software from the floppy several times over a few days.
- Check the size of your system file and other files in your system folder
- afterward; watch for changes in size which don't make sense.
-
- After using the unknown software, run the familiar application; watch for
- unusual behavior. Check the size of the application after running it.
- Applications generally don't change their size much.
-
- Always backup files and application software on floppy disks or tape (after
- taking the above steps) to make sure your system is not infected. If it
- appears your system or applications have been corrupted by a virus, reformat
- the disk and restore its contents from your backup or original software disks.
-
-