This question is an exact duplicate of:
I took the liberty to upgrade to v7.25 today; four hours later (after trying to get back to where I was 8 hours before) I had to used Backup and Migrate to restore my previous v7.24. I've tried numerous update.php attempts but my Admin Module page just will not show via /admin/modules path. I can get admin/uninstall but any attempt to get back to /admin/modules gives me a black white screen so I cannot manage any modules.
Can anyone suggest a solution. I'm aware of Drush and have it to hand, but not too aufait at present (I'm on an Ubuntu desktop with localhost).
I do get a PDO error starting as: PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'has_children' in 'field list':......
if that has any influence.