Helping people with computers... one answer at a time.
Changing your Hotmail user name, not your email address, is easy. Here's how.
Hotmail automatically fills in the "From:" address in the mail you send with your email address, and your name.
Changing your name is actually fairly simple, but getting exactly what you want? Not so much.
To change your user name, sign in to Hotmail, and then click the Options link in the upper right:
Then click on Personal on the list that shows up on the far left, and then click on My Profile.
On the resulting page you'll find places to put your First name and Last name. Those are combined to become the name that is displayed with your email address on the "From:" line in your sent email.
So change those, click save, and you're done. Right?
Not quite. There are two potential issues.
First, you might need to sign out and sign back in again for the changes to "take". The change took immediately for me when I tried it out for this article, but I've also read of people experiencing delays.
Another problem I did experience is that I was unable to erase my name. The erase "took" - my name showed up as "Leo" with no last name, but the test emails I sent still said "Leo Notenboom".
My assumption, then, is that the first and last name cannot be blank - they need to be set to something. Setting the last name to a period, for example, worked. So if your email address is "email@example.com" you might consider setting your "First name" to "example", and your last name to "@hotmail.com", which would simply duplicate the email address information your recipient already sees.