I just updated MSE to the latest build and upgrading the 64 bit version was no problem. I just ran the installer and it offered to upgrade over the top of the older version. However when I tried the 32 bit version on my laptop it said it was already installed (It was but older build). I uninstalled the old build and installed the new build thinking this was not big deal. However during it's install and subsequent update of it's signature files I get a popup saying that windows updates are downloaded and won't be installed until I reboot. I check my services and lo and behold windows update is turned back on even though I had previously disabled it. Sneaky. I checked the 64 bit PC and it remains disabled so it did not do anything just upgrading MSE. Guess who won't be doing that again in a hurry with the WAT update hanging around. I don't care if it's optional at the moment. I can see a time when it becomes compulsory.