How to log all file access in Windows before login?

I am trying to troubleshoot/fix a 30 minute boot time (i.e., the time between power being applied and the login screen appearing). All diagnostics (CPU, HDD, RAM) seem fine, so I simply suspect a bug in the interaction of Windows with hardware drivers/firmware. The HDD bottlenecks almost every process on this computer so, to understand what is happening here, I wish I could get a log of all file accesses (just like the Disk tab in Resource Monitor , but I want it before the system lets me do anything). My gut belief, though I really have no evidence, is that Windows is processing/rewriting som

Question by bobuhito on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.