Since updating to Windows 10 32 bit on all four of my computers, I have found that my email syncs fine in Windows Live mail 2012 program, but the calendar program within this does not.  I just hope everything is compatible with windows 10.  I prefer to use this program instead of the newer calendar apps in win 10.  Everything worked fine in windows 7 32 bit.  I use my yahoo email to sign in to my Microsoft account, as I have done for years: i.e. same email as for outlook.com on line.  I do not use any yahoo calendar.  Could this be the cause?  Any help appreciated.