SIDE NOTE: The "it doesn't seem to have one" part is possibly due to the OS settings: some OSs have an option to show or not extensions: if this option is set to not show, then you are a little more likely to get a virus masked into a file simply because if tit has a double extension (like "file.html.exe") you will only see the extension that seems ok.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-