Often it is not possible to trace from the very beginning of software execution. Obviously, internal application tracing cannot trace anything before that application start and its early initialization. The same is for system wide tracing which cannot trace before the tracing subsystem or service starts. Therefore, each log has its visibility limit in addition to possible truncation (Volume 5, page 301) or missing components (Volume 4, page 342):
One of the solutions would be to use different tracing tools and inter-correlation (Volume 4, page 350) to glue activities, for example, Process Monitor and CDFControl.