Enter your email address. Please use the same email address that is in our email to you (the one that directed you here).The reason for using that email address for creating your Microsoft account is because Microsoft have associated it with your product keys. This means that if you use a different email address, you won't be able to access your product keys.
Once you have done that, click on the Next button. This will take you to Create a password.
Please enter a password. It is a good idea to click on Show password, so that you can see the password you are entering. It is a good idea to save your password because you will need it later.
Once you have entered your password, click on the Next button. You will then be asked other questions but these are straightforward what's your name, what's your date of birth, etc.
Microsoft will then send you a confirmation email. Click on the link in the email.
Congratulations. You now have a Microsoft account.