Windows NT Workstation 4.0

I got to work Windows NT Workstation 4.0 on a pc. After installing MSOFFICE
PREMIUM 2000 and Micosoft Visual Studio 6.0, the workstation crashed. It also had Norton Utilities 2001 on it.
The pc consists of E-POX 7KXA mainboard,
QUANTUM FIREBALL 13 GB HDD,
128 MB PC-100, AMD K7 ATHLON, SONY 10/4/32 CDRW, AND NTFS FILE SYSTEM.
WHAT COULD HAVE CAUSED TO CRASH ?