not only had to update every Windows deployment in the company but also to uninstall patches issued by Microsoft that broke existing functionality.

Microsoft introduced "Patch Tuesday" in October 2003 to reduce the cost of distributing patches after the Blaster worm. This system accumulates security patches over a month, and dispatches them all on the second Tuesday of each month, an event for which system administrators may prepare. The following day, informally known as "Exploit Wednesday",