Hi guys. I scanned my MacBook pro with 1TB SSD with Kaspersky Internet Security and it found 2 Win32 BackdoorTrojan Viruses located in (Library/Mail) and some other prefixes. So I formatted the SSD with the Disk Utility App from Apple and installed a completely fresh install of El Capitan. But after a new Install KAspesky found a second time these Viruses. Can anybody tell me why I get those? I mean, I never surf at websites with harming content (only normal websites) or similar things. How can I format the SSD completely and clean so nothing gets left behind because El Capitan doesn't offer this option anymore?