forums.wsusoffline.net

I wonder why never someone suggest to make the tool also possible to update offline windows installations.

It should not really be hard to do, the dism do also offline installations updating.

It is not that difficult to install the updates, that's right (just "dism /image:Y:\ /add-package /packagepath:..."). But currently impossible to detect, which updates are required as WUA doesn't work in Windows PE (or something like that).