how to download
what if you forgot to click download and forgot ur password and email
You'll have to contact XBox or Microsoft in regards to your account info.
It's a good idea to have the credit card you used to build the account, so you have something to reference w/ the customer service rep. If all else fails, then just get another account. And make sure they cancel out the other account that you used to have. Remember to make sure to cancel, otherwise XBox will charge your credit card every year, for an XBox account, if you don't tell them to stop.
Hope this answer helps.
-GamerGuru