2-parter I was on the internet and one of the windows I had randomly switched to what looked like a windows start up menu or something similar. It had this bar showing some kinda of download going into a folder telling me I had a virus. I figured it was just a windows virus or what ever so I excited out of it. Does n e one know what I'm talking about? This isnt an issue is it? and from being on this site, everyone says not to run any anti virus. So now im curious, how can you protect your mac or know if something is wrong with it.