Microsoft 365 Copilot
It dropped without warning on my Win11Pro Surface Pro 11 and my wife's Win10Home LG 17, and it was IMMEDIATELY popping up in everything we were doing like a damn VIRUS (copy and paste help; do you want me to rewrite that for you; here are your past options; let me show you how to make a reminder from that calendar entry). It makes me want CLIPPY BACK.
I SWEAR ON MY RIGHT TO EVEN OWN A COMPUTER - if I can't bury Copilot on BOTH our computers, I will leave Windows forever. This is infuriating, and I should have just written I AM LEAVING WINDOWS because everything I read last night indicates this is just the tip of the iceberg to monetize the $19 BILLION they have already spent and the $80 BILLION they recently announced.
UPDATE (before I even publish since I started this post last night) - I tried various setting changes; registry edits; even group policy tricks, and that stupid-@$$ Copilot squiggle is still there on every new Word document.
UPDATE 2 (post-publishing) GPEdit did no good again, and no account setting within any of the 365 apps to turn it off, BECAUSE IT IS A D@MN WEED AND IT ADMITS IT (from Ask in the Copilot App):



I've been just ignoring it (mostly) and I don't find it overly intrusive (so far)...
Like @nntheemperor , I want to see if I can just live with it...