I had Windows 7 since it came out. Finally my install became very creaky and unstable. I wiped it and installed Windows 10 and I couldn't be happier. Even on my 2007-era desktop it performs just fine.
I also have Macbook and iPhone, but sometimes I need Windows.
I have also warmed to Office 365. There are risks of course, but I can get a lot of Office type basics done anywhere I have a web browser now. Physical hardware dies, it's not the end of ability to work any more.
Do terrorists consider a Health and Public Services building a high profile target? Doubtful.
I think it's likely entree of disgruntled nutjob, with a side of radical terrrorism.
Like the Oklahoma beheading last year. Sure the guy spouted a bunch of religious crap, but he was also being fired from his job at the food processing plant. Coworkers were killed, not random citizens.
So Mr. Numbskull is all wrapped up in his minor work complaints. Maybe someone says MERRRY CHRISTMAS HERE'S SOME BACON HAR HAR or whatever and that fiinally pushes him over the edge. So he and Princess of Arabia get dolled up and hose down the room.
If he were a pure terrorist, he'd have posted the Princess at the entrance to Walmart to prevent escape, and gone hunting for shoppers trapped inside. Or opened up on the line of people waiting for Santa at the mall. His choice of target is way personal.