Recently I enabled Kerberos authentication for my SharePoint web applications. Since then, we began to receive random blue screens. After analysis of the crash dump, we received the following error message:
BugCheck 7E, {ffffffffc000001d, fffffa6000000000, fffffa60005a5848, fffffa60005a5220}Probably caused by : HTTP.sys ( HTTP!UlAuthenticate+73 )
That immediately ringed a bell, as we implemented Kernel Mode Authentication by manually changing the applicationHost.config file on our webserver. The details on the why and how are detailed in these articles.
Microsoft recently published http://support.microsoft.com/kb/962943, that should solve this issue! At the time of writing, I could only find this KB via the Microsoft Support website – so it must be so recent that Google did not pick it up yet 
{ 3 comments… read them below or add one }
Thanks Thomas. A client had EXACTLY this problem and we’re tearing our hair out!
Thanks also Thomas! We seem to have exactly this problem as well.
I note that the KB article in the link only supplies a Vista download.
Can you confirm that MS did indeed get you a W2K8 fix? We do have a case open with them, so hopefully that answer is yes, and we’ll be able to get it too.
Howard,
The fix applies to Windows Server 2008 too – this is also mentioned at the bottom of the knowledge base article. It’s kinda logic as Vista & W2K8 share the same kernel, and http.sys is a kernel mode driver.