An awful lot of viruses exploit things -you should NOT DO-, and that is why I say it's inexcusable to have them. You have to deliberately turn off your brain, and fail to care about warnings that have been hollered from towers, belfries, tall trees and soap boxes around the world for years, in order to be vulnerable to many of them. Close your shares, change your passwords, turn off services you are not using. If you're stuck with M$ stuff, make it paranoid. Don't do things you -should know by now- not to do. It isn't that hard but it demands more than point-and-drool sk1llz. When news reports start talking about viruses, -care about your system- and find out what risks exist.
Folks, there are people both dedicated and smart who WANT TO SOLVE YOUR PROBLEMS with system vulnerability. They want to give you free software that will keep viruses off your systems. If necessary I will make a -list- of these, do I need to do that?
You can assemble the hardware -cheap-. A $99 Netpliance I-Opener (my home firewall box) can probably run at T1 speeds when it is doing packet filtering, it's way overkill for dialup. You probably want a faster system than that if you are using an IDS like Snort, but it depends on your ability, needs, and level of interest.
It sure wouldn't hurt, either, to consider applying security with an OS designed for it, like
OpenBSD. Do I need to make plain that out-of-the-box M$ products are not biased for security?
Aside: Jaguar, if your English skills are good, but no one knows it, what does that tell you? 'Teh' is not a word. Thi sis nota setnecne. If you are careless with your communication, that tells me you (literally) don't care about what you're saying. I take your word for it and don't bother to read it.