A. If you have installed the PNPISA driver which enables NT to use some plug and play devices and upon reboot said no to install some devices it will not ask you again.
If you later decide you DO want to install the device it is necessary to make NT "forget" that it has ever seen it before. Each PNPISA device has an entry under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\pnpisa and so do make NT forget about a device just delete its key.
- Start the registry editor (regedit.exe)
- Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\pnpisa
- Each device using pnpisa.sys should have a subkey under ISAPNP. Creative Labs uses a prefix of CTL for the subkey name. You'll be able to tell which key is for what device by looking at a description value defined in the subkey.
- Delete the subkey whose hardware you want to install
- Close the registry editor
- Reboot the machine
Upon reboot you will be able to install the device.
For more information on installing the driver see Q. Does NT support Plug and Play?