Have to reset password every time I try to login to Outlook email or Microsoft support/forum

I have Windows 7.  Every time I try to log into Microsoft for this forum and every time I try to log in to my Outlook email, I am asked for my email address and password.  Every single time I get told it is the wrong password and then they have to send an email to my gmail account which often doesn't arrive and I have to keep asking.  When it does, often I type the code in and it doesn't work but even if it does, then they have to phone to give me another code.  When I type that in it tells me again that I don't have the right code and I have to keep going through this over and over until finally I get in.  I don't understand the reason for this or how to stop it.  Every time I try to log in I have to change my password.  Can't we use the same password for a while?  I can't even get a password to last 2 days.  It is very frustrating.  Thanks if anyone can help.