You'd have to pay me a sight more than that before I'd let either Norton or McAfee anywhere near one of my Babbage-Engines
This.
I mean, I try to avoid using Windows for anything important, and Windows installations are considered disposable, getting the fdisk treatment if they start to misbehave. But it's occasionally necessary, and when it is you just want to get on with using Excel or Basecamp or CrossMgr or whatever and have as little to do with the OS as possible. Security products that are designed to reassure the user that they're doing something are inherently obtrusive and therefore a work of Stan.
Also, Barakta's Law Of Antivirus states that all security products eventually turn into Norton.
MS Defender is my weapon of choice, although that's also on my shitlist because its determined to quarantine my own software. It badly needs a "Yes, I know it looks suspicious, but srsly, just let it run you muppet" button.