Windows search is godawful. Not only is it slow, but it explicitly omits a bunch of directories, like AppData in your home. Guess were most applications keep their user accessible data. It's so bad.
If for example someone wants to install a GIMP plugin, you can't tell them to just search for the GIMP directory from their home, because the search simply won't find it.
Search was great in 7. Taskbar search - perfect. Then they did something to fuck it all up. In Windows 10, I get different results for the same search in Taskbar (that's how I launch everything, so if I type "Note" and open N++ a few times, that's it, it should remember it, which is how 7 worked).
Explorer search isn't even working half the time for me lol, either it doesn't show any results or the search bar is completely inaccessible. Fuck knows what's wrong with it, I just use Agent Ransack.
I keep it pinned as the first item in my bottom row of programs so I can hit Win+1 to fire off an instantaneous file search whenever I want. It's great!
The feature could use some work however. I remember trying it recently and OPML support (especially when you have sub-folders) didn't really work.
Personally I use Smart-RSS [1], which is a clone of the original Opera (12) feed reader and runs as a browser extension (both chrome/ium and firefox). It has some bugs but it works well for my use case.