TCCSA Virus Alert
are likely to receive numerous emails with attached viruses. Please
do not click to open attachments.
are likely to receive some emails with attached viruses. Please open
only attachments that you are expecting.
may receive a sporadic email with an attached virus. Please examine
endings of all attachments for programs.
are not likely to receive many emails with viruses attached. Still
use caution with all attachments.
expect this day to come until virus writers decide it is no longer
fun to cause mayhem.
Common Sense Protection
is true that there are real viruses sent and forwarded on the Internet
it is unlikely you'll ever be victim of one if you just follow a few simple
guidelines. This is not ironclad protection, but once you know what to
look for your brain is your best defense against viruses and worms.
I. Don't double
click on any e-mail attachment you weren't expecting.
Viruses are just computer programs. You are in control of what programs
run on your computer UNLESS you give that control over to a computer program
you receive as an attachment to an e-mail. If you weren't expecting to
receive an attachment then it should be immediately suspect.
Attachments with the following endings should
be avoided at all costs: EXE, ZIP, COM, PIF, SCR, VBS, SHS, CHM and BAT.
II. If you receive
an attachment that you can't identify, delete the email.
You can not get a virus from simply reading the text of an e-mail. You
must run or open the attached file (by double-clicking on it with your
mouse). Some older e-mail programs may give you the option to run a file
automatically after download. Turn this enhancement off under the Options
or Preferences menu if this is enabled on your e-mail program.
III. As a general
rule, you cannot get viruses from data files.
You can safely download and view most picture, movie, or sound files as
these are not programs and cannot execute code. For example, for Windows
users, files with extensions .wav, .jpg, .gif, .avi, .mpg, .mov, .mp3,
.rm, .ram, .mid are all data and can safely be run. Watch out for e-mails
that may tell you a file is a movie file or a sound file.
Watch out for double
extensions like a file with "myfile.avi.vbs"
or "myfile.jpg.exe" it is the last extension that determines
the file type. Never run (ie. click on) .exe files without at least scanning
them, and never if they are from someone you do not know.
IV. Use anti-virus
Install anti-virus software on all of your desktops, notebooks, and servers,
and ensure their virus definition files are kept up to date. Because new
viruses can spread extremely quickly, it is important to have an anti-virus
program that automatically updates in order to protect all the computers
in your company seamlessly, frequently, and at short notice.
V. Last Word of
If you are unsure of what kind of file it is just apply common sense and
For more information
on protecting your computer from a virus, click
- Here are the latest Virus Alerts from Sophos. To learn more about
a specific virus, click on the name of the virus to go to the Sophos Information