Ever since building my Opty165 system a few months back I have been experiencing unusual boot times from Windows. About half the time it boots quickly and the other half of the time it seems to stall and would take upwards of 3 or 4 minutes to finally get into windows. The majority of the time it stays on the black Windows XP screen witht he scrolling progress bar. Also during this process there is very little hard drive activity.
Since I was always ultimately able to get into Windows, I didn't mess around with trying to fix it too much. However I have formatted and reinstalled Windows a couple of times and on every install it has behaved exactly the same way.
Now it seems to have gotten much worse. The last several times I have tried to boot the computer, it will stall on the black screen for a whiel then reboot itself, eventually on one of these tries, it will enter windows.