Kaspersky
https://www.kaspersky.com.tr/small-to-medium-business-security/downloads/security-center
https://www.kaspersky.com.tr/small-to-medium-business-security/downloads/endpoint
Trend Micro
http://downloadcenter.trendmicro.com/
Sophos
https://www.sophos.com/en-us.aspx
Comodo