New
#21
Yes, I can vouch for Norton Security. It does not noticeably impact the system whether it's running on my 2 home desktop PCs or my Dell laptop. Norton made their AV solutions light(er) on system resources a few years back. I've also found Symantec/Norton's product & tech support is good.
Kaspersky 2016 does not affect the system noticeably. On the other hand, Bitdefender, which many reviewers tout to be the "fastest", did affect my internet and network speeds by creating a network latency/lag which was resolved by switching off the anti port scanning option. I've avoided BD products since then. My subscription is a waste unless of course the new version 2017 fixes those issues.
This is the reason I always suggest one installs the 30 day trial version before purchasing any utility or security software. Sometimes what works for others may not work for you.