Free Windows Live Hotmail accounts become inactive if you don't sign in for 120 days, or within the first 10 days after signing up for an account. After an account becomes inactive, all messages, folders, and contacts are deleted, but the account name is still reserved. If the account stays inactive for an additional 90 days, the account name may be permanently deleted. If you don't use your Windows Live ID
(The user name and password that you use to sign in to any Windows Live, MSN, or Office Live sites and services. If you have a Passport Network, Hotmail, or Messenger account, you can use it as your Windows Live ID.) for 365 days, your Windows Live ID may be permanently deleted.