Microsoft has a page entitled What is your Startup Failure issue? The page contains
the following topics:Cannot boot Windows NT from CD-ROM
Computer may not boot with CD-ROM installed
Computers with 4 GB or more of RAM cannot boot Windows NT 4.0
Dualboot of WinNT 4.0 & 3.51 fails after NT 3.5x Service Pack install
How to: Disable a third party device/service that prevents NT from booting
Incorrect memory size reported in Windows NT 4.0
Missing NTDETECT.COM file during startup
Ntdetect message appears twice during system startup
NTLDR is missing from the root directory
Shell does not start after logon
Toshiba T4900CT laptop hangs at NTDETECT
Windows NT 4.0 with more than 4 CPUs may stall and reboot after 4 hours
Windows NT seems to hang during boot and slow performance
Windows NT Startup Boot Menu does not appear
Windows NT will not boot after installing DOS 6.2x