cannot send forms/email PDF from QB Pro 2010

I recently moved from running WinXP to Win7 and from Outlook 2003 to Outlook 2010.  On the old computer, I had been emailing all our invoices to clients by sending the forms from Quickbooks Pro 2010.  Since I've changed computers, Quickbooks hangs up when I choose Send Forms.  I eventually get a message saying Quickbooks is not responding and I get the choice to either close Quickbooks or continue to let it try to create a PDF.  I'm still using QB Pro 2010.

Another issue is that Quickbooks Converter PDF 2.0 becomes my computer's default printer each time I unsuccessfully try to send forms.  (I know how to reset default printer to my local printer - it's just a pain to have to do it each time.)

I have tried the Quickbooks Help suggestions without success.  Any ideas?