This was already discussed in a different thread, here is Microsofts take on what was happening: Drew, I work for Microsoft doing support for incidents such as this. My support group is not aware of any such issues. The error code -1073741819 is an access violation. An access violation, if unhandled by the service's code, would cause the service to be terminated. If an access violation occurs in a service that is required for the OS to run, the termination of the service would cause the machine to reboot. (That's an oversimplified explanation.) Please open a support case with Microsoft so that we can get this issue properly troubleshooted (troubleshot?). If you would like, you may email me privately and I'll open a support case and work with you on this. -Matt [EMAIL PROTECTED] 2 days later, I received this email from Microsoft Matt: Drew and I worked on this problem in a private email thread. It currently appears as though his issue is being caused by a non-Microsoft application. I've encouraged Drew to work with the application vendor to determine the cause of the problem. I'm not going to name names until we're sure that we've properly identified the cause of the problem; I don't want to jump to conclusions and put a dent in someone's reputation. Hope this helps you. R. James Stull Network Administrator Caterpillar, Lafayette Engine Center Phone - 765.448.2356 Email - [EMAIL PROTECTED] "Andrew Weaver" <[EMAIL PROTECTED]> 03/13/2006 02:06 To PM To <bugtraq@securityfocus.com> cc Subject Sasser variant that effects 2k3 SP1 completely updated? Caterpillar: Confidential Green Retain Until: 04/14/2006 Retention Category: G90 - General Matters/Administration Has anyone seen a sasser variant that effects Windows 2k3 SP1? We have started seeing servers exhibiting the exact same effects that sasser had back when it was "all the rage" that are completely patched to the latest "Windows Update" spec before ever touching the non firewalled internet. Our firewall is about as restrictive as possible. There are two errors which are similar which evoke the "reboot of death" I have been seeing these again since Saturday. "Shutdown was initiated by NT AUTHORITY\SYSTEM C:\Windows\SYSTEM32\services.exe Status Code -1073741819" I shortened the above error message, but the perinent parts are there, I also noticed that sometimes it is lsass and sometimes it is services.exe. Also, we use ghost to install our operating system, and our ghost image is current up to the last windows update patch, and I have verified that sasser is not on our ghost image. Has anyone seen anything similar? Thanks, Andrew