We have a service which controls our Cisco router which ends for an unkown reason. This always occurs after hours when nobody is at the office, but here is part of the Dr. Watson message in the log:

Application exception occurred:
App: (pid=226)
When: 6/15/2001 @ 2:7:4.226
Exception number: c0000005 (access violation)

*----> System Information <----*
Computer Name: NSCBISFA
User Name: SYSTEM
Number of Processors: 1
Processor Type: x86 Family 6 Model 8 Stepping 6
Windows Version: 4.0
Current Build: 1381
Service Pack: 6
Current Type: Uniprocessor Free
Registered Organization: Commonwealth Brands, Inc.
Registered Owner: SFA Server

Does anyone have any suggestions as to what is causing this service to end?