pci communications error

It is either a modem, or a sound card.

The best way to identify it, is to open the case, and look at the card.
If there is not a card mfg name or logo, the largest IC on the card should help you identify the required driver.
The go to either the card mfg, or chip mfg web site to download the driver.

While you have the caes open, attempt to identify the motherboard.
Before installing any specific device drivers, I recommend installing the latest drivers for the motherboard.

My recommended order is:
Mother board / chipset
DirectX (Microsoft)
Video
Modem
Sound card

For drivers for the modem and sound cards, start at www.driverguide.com
The tutorial will take you through identifying the cards and the driver web site.

For the motherboard, try either www.wimsbios.com
or www.motherboards.org

Chas

Most cases I find this to be the modem. It is probably wanting to have the "wave device" driver for your modem. This file is not required to work your modem and is not hurting your system. I would look for the latest driver and reinstall driver.

Look for modem and sound devices in device manager. If one is missing, this could be it. If the sound is the culprit and it's on the motherboard you should be able to get the driver from the manufacturer. If it's the modem, you should be able to deduce the manufacturer from looking at it.

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