The server's call to a system service failed unexpectedly.

I have an iis server with 2003 sp1 installed. The event  log is filling up with the below error:

Event Type:      Error
Event Source:      Srv
Event Category:      None
Event ID:      2000
Date:            8/1/2007
Time:            10:52:44 PM
User:            N/A
Computer:      IIS01901
Description:
The server's call to a system service failed unexpectedly.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 04 00 01 00 54 00   ......T.
0008: 00 00 00 00 d0 07 00 c0   ....Ð..À
0010: 00 00 00 00 0a 01 00 c0   .......À
0018: 00 00 00 00 00 00 00 00   ........
0020: 00 00 00 00 00 00 00 00   ........
0028: 34 03 bd 00               4.½.    


I have seen other threads on this but no real answer as to what it is. There have been no new updates or patches put on this server either. Actually I cant see anyting new done to this box?? Anyone have any idea what is the casue of this and how to stop ???

Thanks