We have gotten reports from some users that their Send to OneNote Print Driver disappeared after installing the September 2008 (9-Sept-2008) update.  We have been able to reproduce this ourselves and we have some guidance for you all:

If you haven't installed the update yet

If you haven't installed the security update please reboot your machine and then immediately install the update.  By doing this you should ensure that the print driver continues to stay on your system.

If you have already installed the update and your print driver is missing

If you are missing the print driver you should be able to restore it by running a repair of your Office installation.  You can do this on XP by going to Control Panel, choosing Add/Remove Programs and then find Microsoft Office, right-click on it and choose to Repair.  For Vista go to Programs & Features (from Start menu or Control Panel) and right-click on Microsoft Office and choose Repair.

If you have already installed the update and your print driver is NOT missing

You don't need to do anything!

What caused this?

We found that the print driver will be removed if you have printed to OneNote during the same Windows session where you installed the update.  So if you printed to OneNote and then a day later, without rebooting, you installed the update then the print driver would be removed.  However if you haven't printed to OneNote in awhile you can safely install the update without any problem, that is also why I recommend that you reboot before installing this update.

We apologise for this and we are looking into why this happened to ensure it doesn't happen in the future.