My Windows Live Mail works perfectly but when I click on an email in the Sent Items, click the forward button, it then freezes for almost 2 minutes before I can then edit that email to send to someone else.  If I make changes or delete the original wording in the email, I get the same problem - when it is doing this, I can't even click back to the Windows Live program at all. 

I can then type, add an email address and send that email with no problems.  I have Windows 10 but have had this problem before with Windows 7.  I do have 7 different email accounts in Windows Live, not sure if that is the problem?

Thanks