If the first thing someone does is find a way to remove Windows Defender, I'm going to assume they're too clever for their own good. Windows defender is one of the best things Microsoft did for Windows. Prior to defender, the array of vendor AV solutions was a complete shit-show. Even previously useful options got bought out by the major players and stuffed full of crap-ware.
I agree windows defender was an absolute game changer, but have you used it in Win11? I upgraded a fairly beefy workstation from win10 to win11 and immediately started to see 10-15x slowdowns on the first run of a task after boot. Things that took 20 seconds were taking 3-4 minutes. I took an etl trace and discovered it was windows defender. Subsequent runs were about 20% worse than on win10. Adding the folder to the…
Yes it could also be trying to then virus-check all the data it's sending and receiving without my informed consent.
I'm not trying to say windows 11 is good, just that it's an odd thing to first remove the one product that is still better than the alternatives. Because as horrible as defender is, have you experienced commercial AV products?