[sagher]

ESAT Node Antivirus, Kaspersky total security, Norton antivirus all are make your PC loaded and slow down the performance if you use patched or cracked versions.
if you want to take some free malware protection then Windows defender and 360 security and Mcafee security enterprises 8.8 are best.
Bitdeffender is a high choice its mostly on top of the position in last 3 to 4 years. i was use this for a year with trial reset.