Plug and Play Devices Not Detected or Installed

When you install Windows NT 4.0, Plug and Play devices in your computer are not detected and installed.

Windows NT 4.0 does not support Plug and Play.

The driver library on the Windows NT 4.0 CD-ROM includes the PnP ISA Enabler driver, which may allow the detection and installation of Plug and Play devices in Windows NT 4.0. Install the PnP ISA Enabler driver (PNPISA) using the following steps:

NOTE: Although Windows NT includes PNPISA to detect Plug and Play devices, Plug and Play devices are not supported in Windows NT 4.0. PNPISA is provided as a "use at your own risk" tool.

1. Locate the Pnpisa.inf file in the Drvlib\Pnpisa\<processor-type> folder on the Windows NT 4.0 CD-ROM.
2. Right-click the Pnpisa.inf file, and then click Install on the menu that appears.
3. Restart your computer.

After you restart your computer, you may receive a message that Windows NT has detected your Plug and Play device(s).

Note that PNPISA is not enabled by default.

For more information on installing and potential problems review the following file on the Windows NT 4.0 CD-ROM: