$ 0 0 @loverboyerror 0xb7 occurs when you already run a tool which odes ETW tracing (ResMon, ProcExp):http://www.msfn.org/board/topic/155479-xperf-error-nt-kernel-logger-cannot-create-a-file-when-that-file-already-exists-0xb7/posted by MagicAndre1981