This is a personal choice, but i personally would recommend.


Sygate Personal Firewall: Says it works on win98- there is also a free version. I used to use this on XP for years (the free version).

AVG Anti-Virus Free Edition: Also claims to work on 98 and is a great free anti-virus system, also available free.

Installing these things and setting them up (like Firewall permissions) - can be a bit scary at first. I would STRONGLY recommend you play with installing them on your home personal PC first and get the hang of them before installing on your work comp.

Hope this somehow helps you.
Good luck with it.

I intentionally didn't post links on here, but if you do a search on each of the bold titles you will find free versions of both.