According to this site [1], Bitdefender is amongst the most efficient antivirus packages for passive slow-down, and I can confirm that this has been my experien

According to this site [1], Bitdefender is amongst the most efficient antivirus packages for passive slow-down, and I can confirm that this has been my experience running an engineering firm that uses their enterprise security product, Bitdefender GravityZone. If you solve for efficiency (effectiveness over performance), Bitdefender has one of the highest detection rates (over 99.9%) and lowest false positive rates in the industry, making the effectiveness-performance ratio very impressive. Many other A/V packages are bigger hogs and yet detect less malware, with more false-positives. I'll admit their interface isn't great, but they did a refresh recently in their Enterprise product and now it's much more subdued (finally). They also changed their branding from bright Red to White, so it doesn't pop in the taskbar as much as it used to. It's worth noting that Windows Defender is amongst one of the only AVs that scores as effective as Bitdefender, but from my research it seems like Bitdefender's predictive engine is significantly better in benchmarks at fighting new/novel malware. Is it worth the approx. $100/yr? Not sure. I have considered canceling our subscription to Bitdefender and using Windows Defender, as the premium offering is already included in our Office365 licensing.. but I think that obscurity (using a non-standard security product) could be a defense in itself. [1]: https://www.tomsguide.com/us/av-software-least-system-impact,review-6276.html https://www.tomsguide.com/us/av-software-least-system-impact...