If your Windows 7 Event Log is getting filled with the following error: Session "Circular Kernel Context Logger" failed to start with the following error: 0xC0000035 With details like: Log Name:      Microsoft-Windows-Kernel-EventTracing/Admin Source:        Microsoft-Windows-Kernel-EventTracing Date:          15/09/2009 14:48:38 Event ID:      2 Task Category: Session Level:         Error Keywords:      Session User:          SYSTEM Computer:      Picsoetje-PC Description: Session "Circular Kernel [...]