Windows 10: Calculator doesn't initiate.

Well, since you've asked so nicely... *Smile
As of now I have:
Windows 10 Home
Version 1511
OS Build 10586.36

The first notification in my Action Center was about Dolby Home Theater V4 "...not working properly". I didn't take a screenshot of an exact message because when I clicked on "Learn More" it brought me to the Microsoft webpage explaining what's going on but at the same time it deleted the notification itself and I couldn't see it again. If you know how to view cleared messaged in the Action Center, please let me know, I couldn't figured it out even with the google search. So this is the Microsoft webpage:



I went on the Lenovo website but they only have drivers for Windows 8:



Dolby's website only lists other manufactures websites for help with the drivers:



Acer's website doesn't even list in their support my build but gives the generic model list of drivers, where Dolby Home Theater V4 is not listed:



As long as there is audio coming out of my speakers I don't really care that much how it works so it's a very lower priority for me now.

The second issue was with Host App Service:




The details:




I've never used that App before and if it was running in the background and the current Build doesn't need I am fine with that too.

 

Several months ago, I removed all apps except Store using PowerShell. I was missing Calculator, so today I tried to reinstall using PowerShell and got a bad command message. I tried a different command, which was sufficiently different, but it didn't restore the Calculator. I installed it from the Store. That worked well. I would have done anything to avoid reinstalling W10.

 

Have you tried resetting the Calculator app?

 

"I installed it from the Store. That worked well."

No further action was required.
Done.

 

@smerH: If all else fails, you can download and install the old calculator:





Downloads / Tools by other people / Old Calculator for Windows 10 from Windows 7 or Windows 8