Chris Walker said: >So the question is which is the best anti-virus software, or are they >much the same? I don't use .mac so Virex is out, which I guess leaves >Intego or Norton. > >Has anyone experience of either of these that they might care to pass on? > I'm most interested in whether either of them are obtrusive, or likely >to mess up my system (X10.3.5) in any way. Intego's VirusBarrier is entirely seamless. But the Intego folks told me that it does not look for any non-Mac viruses. Norton Anti-Virus (NAV) installs a kernel extension and has been implicated by a number of folks with causing instability in OS X. Note that it is highly unlikely that you might unwittingly transfer a Windows virus to a Windows-using colleague. Windows-only viral e-mail attachments that you receive can just be trashed, they are easy to spot, so it isn't at all likely that you will be re-sending them. Files that show up with macro-viruses can be blocked by setting "Macro Virus Protection" in Word's preferences. Any unknown macro can be deleted in Word. You aren't going to be a go-between for transfering Windows applications, are you? So VirusBarrier should be all that you need. The "problem" of Macs being carriers and spreaders of Windows viruses is a myth perpetuated by Windows biggots. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Routine OS X Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html