I bought tux stickers to stick them onto the windows icon of my keyboard. However it is a lighted one. So you had tux on top and in a red light the windows icon shined through. It was even more cursed that way.

Our company uses eset https://www.eset.com/us/home/antivirus/

But afaik it costs money to really work.

But your brain should be the best antivirus you have.

People still run windows 7.so nothing changes