Google has taken the unprecedented step of warning millions of users whose PCs are infected with fake security software and other malware. The warning appears as a bright yellow banner that reads “Your computer appears to be infected” at the top of the page after users conduct a search with Google. Security experts are leery of Google’s move, saying it’s not unusual for scareware to redirect traffic through proxies. Google does not eradicate the malware or scareware from compromised computers, but only warns users that their machine is infected.”]