Autopatcher is an ongoing project that creates a monthly executable that contains all patches for Microsoft operating systems that have been released in that month. It is then possible to execute this program and apply all patches that have been released by Microsoft at once without connecting to the Microsoft server at all.
This is in my opinion the best and easiest way to patch your operating system if you do not want to use the automatic update feature and do not want to connect to servers from Microsoft at all. Normally so called core versions and full versions are released but due to the changed at the original Autopatcher website only core versions are available.
Core means that only patches of a certain month are offered while full means that the package contains all patches that have been released for that operating system.
It is possible to currently download the core June patches for Windows Vista 32 and 64 bit and Windows 2000 / XP 64-bit only.
A core release for XP 32-bit will surely follow soon after.

Autopatcher June 2007 for XP finally released
Autopatcher 1.0.0.6 Released
Autopatcher Updater 1.04