With the computer running in Windows 98, open Control Panel, double click the Add/Remove Software icon, select "4DWave PCI Audio Installation" click the add/remove button and remove the software, then close the applet. Now double click the System icon, select Device Manager tab, expand the Sound, Video and Game Controller category, select the Trident 4DWave(NX) PCI Audio, click remove, and click OK if it gives the error message, do not reboot, select the Trident Legacy Audio, click the remove button and click OK if the error message displays, select the Direct Input Device, click remove and OK if the error message displays. Now the only device left would be the Serial Wave Device for Voice Modem, or Wave Device for Voice Modem. Click OK. Tell Windows to restart.

As the computer restarts, note the "Press (DEL) to enter setup" message and press the DEL key when it displays. Now you are in CMOS or BIOS setup. The menu has right and left panels. Identify and highlight PNP/PCI Configuration, press enter, note on the right panel the item "Onboard Sound IRQ No." - the parameter should be set to AUTO, if not highlight and use page up/down (Pg Up/Pg Dn) to change it to AUTO. Press escape (Esc), in the main menu highlight "Save Settings and Exit" answer Y for yes and press enter to exit. Now shut off the computer, DO NOT BOOT INTO WINDOWS.

Remove the 3 screws securing the case cover from the back of the computer. Unplug the Power Cable, remove the case cover, lay the computer on it's side so you can look down into the case. Position yourself so the face is on the right and the back panel is on the left. Immediately above PCI slot 1 is a single jumper block label SOUND or JP6, remove the jumper and slip it back down over just 1 of the 2 contacts so that the jumper block is now open instead of closed.

You have disabled your onboard sound card. Now install your new sound card into either a PCI or ISA slot, whichever is appropriate for your sound card. Remove the audio cable from your CDROM drive where it attaches at the motherboard and attach it to your new sound card. Make sure your new card is properly installed and secured into the case. Finally stand the computer back up, install and secure the cover and reattach the power cable.

Now boot into Windows 98, the new sound card should be detected, you will need to load the appropriate drivers, you may need to enter the Sounds applet in Control Panel to reconfigure your sound scheme.