News Microsoft Zaps 5-Year-Old Defender Bug, Reduces CPU Usage by 75% in Firefox

[KyaraM]

defender used to be junk, back in old win7 days got massive lags in mmorpg sieges with defender, wasted like 80% cpu (6core cpu)

The keyword are "used to be" here. I have seen a few tests the past few years showing it being quite decent.

 

[jeremyj_83]

defender used to be junk, back in old win7 days got massive lags in mmorpg sieges with defender, wasted like 80% cpu (6core cpu)

That is because back then it wasn't defender it was Microsoft Security Essentials and not baked into the OS. It was like a 3rd party AV and most of those suck up a lot of CPU resources. Defender is now part of the OS and works quite well as an AV.