PCI Communication help

im having a problem with this at the moment im using windows 98.

Comment from ffontan1@txued.com on 09/21/04:
no driver hardware missing. Is ther anything not working on your PC like sound etc? no modem is not working.
yes I have re-installed driver and update.
I whan into control panel / system, click on device manager. Look for any devices with a yellow exclamation mark. no If mark. They no are duplicate entries remove them. If you can’t see anything wrong in the device manager, i have boot into safe mode and have a look from there all is ok.
i read this and sometimes when i start my computer the sound works…. other times the sound does not work! there are exclamation marks next to PCI Communications Device and PCI Netowrk Controller. Thanks