Avast has done a good job keeping me safe online. It tells me when it needs to prevent me from connecting to any sites that are not safe--and they can look like they are innocent enough--but Avast tells me what is wrong with them and why I shouldn't connect to them. And then when I do an antivirus scan with Avast Free Antivirus, I am free and clear of malware and visuses. So their protection works for me quite well, even though my OS is not "supported" by the manufacturer any longer.