Event ID 3 Active Server Pages started

Event ID 3 Active Server Pages started

am 05.10.2004 19:12:58 von Ron Niederer

Can anyone tell me what causes an Event ID 3 - Active
Server Pages Started to occur?

Here's my scenario: Last night some updates were
performed on a web server and the system was rebooted.
This morning I recieved reports that users wer getting
random page not found errors. When I checked the problem
appeared to be gone but I found the above mentioned Event
ID 3 in my event log. Interestingly enough there was no
corresponding Event ID 4 before this event.