Problem
SharePoint 2007 Web Front End (WFE) servers crashing repeatedly. Environment is SharePoint 2007 (MOSS Enterprise) 64-bit running on Windows Server 2008 Standard. Server was crashing repeatedly with CPU spiking to 100%, blue screen, and server rebooting itself. System log showing BugCheck event (1000) entry with code 0x0000001d:
The computer has rebooted from a bugcheck. The bugcheck was: 0x000000d1 (0xfffff9802ea0ef50, 0×0000000000000002, 0×0000000000000000, 0xfffffa6004e06ed9). A dump was saved in: C:\Windows\MEMORY.DMP.
Resolution
After a lot of troubleshooting, it turns out it was Trend Micro Common Firewall Driver (Trend Micro OfficeScan Client 8.0). When we disabled the firewall, problem resolved.
The following is a KB that is related.
http://support.microsoft.com/kb/962943/en-us
Maybe the firewall driver also uses http.sys?
Hope it helps someone.