Try it this way:
Go to the link
http://get.live.com/mail/overviewRight click on Get It or Sign Up and click Copy Link Location
Copy/Paste that into a new window and remove &hm=1 from the url
Example:
Before:
Code:
https://signup.live.com/newuser.aspx?mkt=EN-US&hm=1&revipc=US&ts=3969365&sh=NT8!&ru=http%3a%2f%2fmail.live.com%2f%3fnewuser%3dyes&rx=http%3a%2f%2fget.live.com%2fmail%2foverview
After
Code:
https://signup.live.com/newuser.aspx?mkt=EN-US&revipc=US&ts=3969365&sh=NT8!&ru=http%3a%2f%2fmail.live.com%2f%3fnewuser%3dyes&rx=http%3a%2f%2fget.live.com%2fmail%2foverview
Then hit enter and you will be redirected to sign up for an account.
Update: This trick doesn't work anymore.