This morning one of my computers did hanged into a black screen. It done it for no reason and unable to restart few times.

I have to press the power button a few times to restart and nothing happened until when I press the F8 key on the keyboard. All as normal after this and found no error in "Computer Management". The OS is Win2k SP4.

I just found out something that looks to be related and true with my computers NTFS HD - Big file changes recently, 30 GB of videos moved to another computer and new videos of 32 GB transferred into the same area.

Check out from Microsoft a fix: http://support.microsoft.com/?id=820888

Did anyone experienced this same problem of a black screen?