My laptop unexpectedly upgrade to Windows 10 (from Win 7) today, without my permission.  Now I cannot open my Windows live Mail account.  Says "Your Calendar contains corrupt data that is forcing Windows live to close (0x80070057).  

No other suggestions.  I tried repairing the program and it goes through 100% but immediatley a pop-up says that there is no internet connection (though there is) and the process locks up.  No other options.  Restarted PC and no help.

Please help!  Is there anything I can do?