I'd like some advice on how to rid my computer of a macro virus O97_TRISTATE.

It is a virus which cross infects between Word, Excel and Powerpoint files.

I have Norton Antivurus 2.0.1 for Win 95 which did not protect my computer because the virus definitions list did not include O97_TRISTATE. The NAV website advised that I download the latest definitions via 'live-update', which I did ,but still the virus definitions list did not contain O97_TRISTATE or its synonyms.

I'm not sure what to do next!