Recovering a password for an account (used daily) (5 days) - resetting the password for a Steam account that was last logged into more than 2 months ago.
Newly authorized computer (7 days) - formatting a computer, clearing browser cookies, reinstalling the Steam application, changing the web browser.
Recovering a password for an account (not used for at least 2 months) (30 days) - resetting the password for a Steam account that was last logged into earlier than 2 months ago.