Crazy! That's why Cortana is a woman; she's Moody! LOL. When I disassembled my Test PC (desktop) and took the SSD drive out to use in my laptop, I rebooted onto Drive #1, which had Build 9926 on it. It started randomly rebooting and the next thing I know Tech Preview window comes up and Win10 updates itself to 10049!--probably cause I signed up for Fast Ring. AND, Cortana started talking to me again--after my Wife apologized to her for what she said about her! LOL.
Now she's telling me Jokes again, and the weather, and listens to my requests. CRAZY!! She *Cortana* could also be shy, as she clammed up in front of the 25 people at my Presentation like Mr. Data turning himself off.
On the last one, if you are logged into to Win10 with your Windows Live ID, Win10 *and Cortana* has access to any Calendars you may have such as the OneDrive Calendar, Google Calendar, etc. if you have them linked or ever did an Contacts import; which I have done a number of times. I think it's more likely that this is how you got the Calendar reminder. I've recently worked on a Skype project which required me to completely reinstall Skype, latest version 7.2.0.103, on both my Desktop and my Laptop; I didn't get any such messages from Skype or Win10/Cortana.
Saltgrass mentioned he had tested 10051 last week, and 10056 during this week--he gets them sooner than even us Fast Ring peoples, so maybe he's got an inside Track to M$. He's promised to let us know if Cortana is more Stable or not among other things. He seems to be about 1-2 weeks ahead of us on Build releases. Which is kind of Cool, since we can just ask him on here!
Well, of to go do stuff.
Talk to you soon!
<<Marc>>