Have you ever had system resource issues where checking Task Manager in Vista seems to point to an instance of SVCHost.exe? Well, the difficulty here is that multiple dynamic link library (.DLL) based services can be hosted within a single SVChost.exe, and there can be multiple SVCHost.exe open simultaneously...

AutoEnrollment & MMC Enrollment Enrollment Dependencies: The Certificate Template has been published to the Certification Authority. If Service Pack 1 has been installed on the CA and the CA is on a DC: Verify that the CERTSVC_DCOM_ACCESS group contains, Domain Users, Domain Computers...

From a consumer point of view seeing the message, "Internet Explorer has stopped responding" can be frustrating. Fortunately with Windows Vista information is collected about the hang which can be sent to Microsoft for further analysis, however you may not always get an answer on how to solve the problem...