Mr Tulip said:
If you're using MS products (I'm not suggesting you shouldn't), then their built-in antivirus is as good as anything you'd pay for. Running another product isn't harmful. It's just adding an additional load that has no real benefit.
Depends on the circumstances. I was the sole IT guy for a company that had 80+ folk. I ran a hardware firewall and a software firewall on them. Backed it up on a big cassette backup drive. Had two Windows servers and one Linux Red Hat. I would never put only the Windows antivirus on something like that. That was back in the days of Love Bug and I LOVE YOU viruses. I used McAfee with licenses if memory serves.
BTW - Red Hat was not my thing, but I put up with it. Will take Windows Server any old day, so much easier IMO
Then the last biz I worked at before I broke my back, we were installing VOIP. They wanted to do it themselves and I spoke with the boss and he said 'Let them' and gave me a couple of days off. After two days of being down, they still couldn't get it to work so I offered to come in on my second day off and help. I fixed it in about 5 minutes. Even though I had told them what not to assign, they assigned the same range of IPs as we were already using for our PCs... went outside the assigned range I was using, and low and behold, they worked!
Setup a couple of businesses for a friend of mine after that, but they were cloud based. All my knowledge of Servers felt like it just went down the drain!
"It always seems impossible until it's done." – Nelson Mandela