I'm running the latest 10 preview build on my 830 and Cortana is complete crap now. Reminders aren't working, location things aren't working, search results are just web listings, no local results, WTF?? I tell Cortana to remind me in 10 min to do such and such and ten min rolls by and nothing! Tried saying remind me at a specific time and nothing. I can't have my wifi turn on when I get home anymore and location based reminders don't work either. I tell her to find something and I get a Bing page with generalized results, no options for anything local or near me. Microsoft has their head up their @$$ with this whole Windows 10 thing. It's garbage. A featureless piece of garbage.