The nonprofit that oversees Wikipedia briefly enforced a 'read-only' mode on Thursday morning as users spotted code designed to delete articles and place Russian text in the edit summary.

The Wikimedia Foundation suffered a security incident today after a self-propagating JavaScript worm began vandalizing pages and modifying user scripts across multiple wikis.

To fix the Excel error, There's a problem with this formula in Windows, check for unmatched or missing parentheses & ensure the function syntax is correct dirst.