After this week's security updates installed themselves and kindly rebooted our server (yes we normally turn these off but this one got through), we discovered that our internal Microsoft Office SharePoint Server 2007 was no longer working.
After narrowing the problem down to Security Update for Microsoft .NET Framework 2.0 (KB928365), we determined that somewhere along the line SharePoint was not loading properly. IIS was happily serving up basic HTML pages, but when we tried to hit even the Sharepoint Central Administration page, all we got was a 404 error. The Event Log normally has some sign that something is wrong, it may not give you the detail but at least it mentions something. However, in this case there was nothing at all other than Search Crawler failures.
Just as we were starting to think we were going to have to go down the usual, install/re-install, fiddle with some settings then install again route, on a whim I decided to check the Web Service Extension settings in IIS Manager. As it happens I was rewarded with a surprisingly simple fix. It turns out that something in the 7/10/2007 security update patch process managed to disable ASP.NET v2.0.50727 – exactly the thing that MOSS needs to work. So, just the click of one button set everything right as we were back up and running again.
I love security. :-S
For anyone else that has hit this problem just go to IIS Manager:
Click on "ASP.NET v2.0.50727" in the right-hand pane, and click the Allow button. All you should see is the status changing as below.
That's it. Now go hit that Sharepoint URL again and you should be rewarded with success.
If that worked for you then I'm glad I could help. If not, I'm sorry but that's the wonderful world of security updates for you...