I have Vista Home Premium. After each startup the hard drive light shows a lot of activity for several minutes. After adding "I/O READ" and "I/O Other" columns to the Task Manager Processes view I see that svchost.exe is responsible for disk activity. This in turn points to the new AudioEndpointBuilder service which must run to support Windows Audio service.
It appears from the I/O count that the AudioEndpointBuilder service is doing something with every file on my hard drive (perhaps building a database or possibly searching for files associated with audio).
I cannot disable AudioEndpointBuilder without also disabling Windows Audio. If I "End Processs" the scvhost.exe instance that is associated with AudioEndpointBuilder it will stop the Disk activity for a short period of time but then something restarts it again.
I really dislike having any service that hammers on my hard drive like this after each startup. Can you confirm that other Vista Home Premium PCs have increasing "I/O reads" & "I/O others" when viewed in Task Manager for the svchost associated with AudioEndpointBuilder and propose a way to put a stop to this type of I/O activity without stopping Windows Audio?