Compaq Armada 7400 Reference Manual page 17

Either Microsoft Windows 95, Microsoft Windows 98, or
Microsoft Windows NT Workstation is preinstalled on the
computer.
Compaq has enhanced the preinstalled operating systems on the
computer to provide you with additional software features and
increased computer functionality.
Before deleting the operating system preinstalled on the computer,
please read the following Caution:

In addition to the operating system, Compaq installs other
software to provide additional functionality or enhancements. If it
is necessary to reinstall the operating system and you do not want
to lose these enhancements, it will also be necessary to reinstall all
Compaq software for your computer. Refer to the Compaq
Internet site (www.compaq.com) or contact Compaq customer
support for more information on this additional software and the
various tools available to help reinstall.