If it's this, it's likely that the MKV file OP had just happened to hash-collide with a different known malware and caused Defender to recognize it.
IverCoder
Newbies hating on Flatpak, Wayland, PipeWire, SystemD, and other new stuff that actually works unlike their predecessors because they were told by some racist boomer Linux YouTuber to hate those
Imagine being deaf and having to use subtitles
Your Costco must be managed by a Filipino, I guess
Here in the Philippines, we're on full-blown Christmas decors since late August. Complement Halloween decor will be temporarily around a few weeks in late October. The Christmas decor is dismantled early February and replaced by Valentine's decors.
I find the complaints of other people on this thread weird, for me I see nothing wrong with early Christmas decorations, and your region is already too late anyway. But I do want to hear about why some people find this infuriating.
Here in the Philippines, specifically in Digos City, we're at 10μg/m³ which is twice over WHO's safe values. And this is in a tree-filled quiet town. I wonder how they handle it over at the bigger cities.
Context?
Southeast Asia is very impacted as well. I live in Digos City which doesn't have any weather stations, but our neighbor Davao City's sensors say 10μg/m³ which is two times over WHO's guideline value. And we're a pretty quiet city, I wonder what things will end up being once urbanization swoops us down.
Murder Everything®
Tip: take a look at r/Linux and the Phoronix forums 😉
Yes. Although the previous method didn't really need manual intervention, so as long as you go online at least once every few months it gets automatically renewed.
But this method activates Office permanently with no need for internet connection, so you can run away from civilization to an unmapped forest with your laptop, and Office remains activated even if you stay there forever.