Error: Your password is 16017 days old, and has therefore expired.

[Wayne Luke]

You would use a tool like phpMyAdmin. Your hosting provider will usually provide access to a tool to access the database and run queries. If you know how to edit files, you can run queries in vBulletin's admincp but it isn't a function you should leave active all the time.
To run Queries in the Admin Control Panel you need to edit your config.php file and add your user ID to the Can Run Queries section. It looks like:

// ****** USERS WITH QUERY RUNNING PERMISSIONS ******
// The users specified here will be allowed to run queries from the control panel.
// See the above entries for more information on the format.
// Please note that the ability to run queries is quite powerful. You may wish
// to remove all user IDs from this list for security reasons.
$config['SpecialUsers']['canrunqueries'] = '';

Place your user id between the single quotes.

[Humdani Hdc]

how to update. user?

[Humdani Hdc]

how to run this query?

[Wayne Luke]

Run this query:

update user set passworddate=NOW() where userid = X;

X would be the numerical userid of the user with the problem.

[Humdani Hdc]

I already changed pass but still this error. Your password is 16017 days old, and has therefore expired.