I just found this tweek 5 min ado and after doing it my system booted in 1 second flat. I highley recomend everyone does it now. I dont know about any file that will change it other than bootvis, which never worked for me. one guarunteed way to get faster boots, is to change the prefetch options. do this start > run > type regedit > navigate to HKEY_LOCAL_MACHINE > SYSTEM > Current control set > Control > Session Manager > Memory Management > Prefetch Parameters. change the value in EnablePrefetcher from 3 to 5. reboot and watch the faster speed.