WSUS 3.0 on SBS 2003 with CRM-SBE

So I am a little behind and haven't installed WSUS 3.0 yet and hearing all the success stories of how easy it installs I jump ring in on my production server, install the prerequisites, KB927891 , MMC 3.0 & Report Viewer and then reboot the server. When she comes back up I run setup for WSUS 3.0 and it is going along very nicely until near the end when it dies a horrible death.

So I hit OK and get

And once more and get

So you might have guessed at this point I wasn't smiling, so I did what anyone in my position would do, no I didn't start crying, I pinged the community to see if anyone had any ideas. Sometimes just talking through a problem bring the obvious to light. Yours and my favorite detective Susan found in the error log where the W3SVC service had trouble stopping so opened a DOS Box and try to stop it manually, it did in fact stop, but it took a little longer than one would expect. When I was explaining this of course I pointed out that it was normal due to CRM being on the box so there was more to stop. So that's when she stated the obvious solution that I had looked right past, stop the CRM service before you run the WSUS setup.

So hopefully I can save you the agervation of the initial install failure and let you know about this before you try. Once I stopped the CRM services the install went through without a hitch (ymmv), unfortunately the second time through it doesn't do an upgrade, it does a full install so you have to reset all the options.