The "dirty bit" is set on my system drive, but every time NT boots,AUTOCHK reports that it can't get an exclusive lock on the drive, so it won't scan it. I suspect that some driver is loading at boot time that is opening files(?) I checked "Drivers" from the Control panel and didn't see anything suspicious. The driver listing from the /SOS flag in BOOT.INI scrolls by too fast for me to see it, even after several boots.
NT has lots of logfiles, but I've never found one that logs boot events (like WIN95 does). Is there a way to turn such a log on, or does anyone have any other ideas as to why I can't check/repair the system drive?