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 ;-)