I just had a serious issue with the latest exchange rollup (for exchange07)
Thankfully it was on my personal server and not on a clients.
Windows Update notified me of the availability of the (fruit)rollup.
I said, ok, downloaded, installed...and kaput.
I realized something was wrong when my pocketpc wasnt in sync.
I "run"to the exchange server, and after about 30 seconds of going through the first troubleshooting procedure, i realize that all my exchange services had been disabled. and iis. DISABLED.
it took me a good few hours to figure it out.
what had happened was that the automatic download and istallation of the rollup was bad. the installation procedure was corrupt.
i manually downloaded and installed rollup 5, and also kept an eye on the services, and indeed, they all get stopped, disabled, enabled, and then started again.
With my experience, i would recommend manually downloading it, and installing it.
Then again, i wouldnt expect an update to create so much confusion.
I would manually start the services, set them to auto, everything as it should be, and it wouldnt work, something wouldnt start. IIS gets shut down too, did i mention that??
Anyway, i hope i helped ...