Device Manager Errors-Sound Card Related?

Recently we popped up Device Manager errors on a weird combination of things including:
Under CD Rom Drive:
HL-DT-ST CD-RW GCE-8160B

Under Modems:
SoftV92 Data Fax Modem

Under Network Adaptors:
1394 Net Adaptor

Under Sound, video and game controllers
Creative SBLive! Series (WDM)

Under System devices:
Plug and Play Software Device Enumerator

All sound controls are dead. In Device manage - not able to update drivers or troubleshoot. The machine is about 5 years old - running Windows XP - reinstalled (Complete install - reformated the HD) over ME. We added new Memory 512M about 2 years ago no problems. Only change as of recently a half complete download of a maj jong game from MSN (Cancelled about 1/2 the way through). Any idea where to start (Sorry am more of a software person not real comfortable with the hardware)