Outlook 2013: Crash when the E-Mails are sent

Hi

I installed Office Professional Plus 2013 64-bit on Windows 7 Ultimate SP1 64-bit.

In an account of Users type, I have configured Outlook 2013 to receive and send E-Mails to a public account of Yahoo.

Outlook worked fine for a week.

Now, when I try to send the E-Mails, Outlook is closed and Windows 7 displays the classic window troubleshooting with the following error:

Problem signature:
   Problem Event Name: APPCRASH
   Application Name: OUTLOOK.EXE
   Application Version: 15.0.4420.1017
   Application Timestamp: 506742d6
   Fault Module Name: OLEAUT32.dll
   Fault Module Version: 6.1.7601.17676
   Fault Module Timestamp: 4e587ee8
   Exception Code: c0000005
   Exception Offset: 00000000000011d0
   OS Version: 6.1.7601.2.1.0.256.1
   Locale ID: 1040

Additional information about the problem:
   LCID: 1040
   skulcid: 1040

How come?

Thanks

Bye

Balubeto