Best internet security ur opinion
Considering all factors:
1. Kaspersky
2. ESET
One can only use published test lab results as a guide since what components are tested and how they are tested varies from lab to lab. Consider, for example, that KIS always performs towards the back of the pack in Virus Bulletin testing while at the same time always places in 1st slot when tested by MRG.
To confuse the potential user even further some AV tests are performed with default settings, others at maximum settings. This seemingly minor detail greatly influences results. In other words, AV at default settings may perform significantly better at max settings.
Plus I'm not convinced that AV lab testing is not biased in one way or another.
Both KIS and ESET have a long-standing reputation here at MT.
KIS has better removal routines than ESET...
Kaspersky
support is located in India. ESET, I think, is still Czech-based ... but I could be wrong on this detail.
(Personally, I have a difficult time understanding some of the Asian sub-continent accents. My ear is not trained. I think ESET support is more polished ... and generally a more refined product overall.)
Kaspersky is the technological leader (especially digital forensics)... and I do not know how anyone could refute it (but this is MT and there is someone...I'm sure of it).
KIS is only available in 32 bit version (32/64 compatible).
Performance impact ... will depend upon hardware of specific system.
But it is funny how, when softs is installed on system, personal preferences become more important and trump a lot of technical specs.