I had a malicious software attack that messed up my drivers after I cleaned up/ removed. Was able to remedy video by reinstalling driver, but still having issues with sound. Here's what I've done:
Reinstalled and updated sound card driver
Reinstalled Windows Media Player 9
Made sure speaker device on WMP matched driver. There are no advanced settings for me to check (as mentioned in other posts).
Reinstalled DirectX
Did registry check
Checked to make sure on system device manager there were no conflicts and that driver said it was working properly.

Still no sound. Here is other information that might be helpful:

Sounds and multimedia properties. Under audio playback device it says no playback devices.

WMP error message says: 0xC00D11BA: Cannot play the file.

DirectX diagnostic for sound results in error message: DirectSound test results: Failure at step 3 (DirectSoundCreate): HRESULT = 0x80004005 (Generic failure)

DirectX diagnostic for music Microsoft Synthesizer results in error message: DirectMusic test results: Failure at step 6 (Activating the IDirectMusicPort): HRESULT = 0x80004005 (Generic failure)

DirectX diagnostic for music for SiS 7018 Wave is succesful (and I can hear music when this is tested).

What's next? Any help is appreciated.
Thanks for your time!

Hya

Your detailed troubleshooting may have paid off! This is almost certainly a system.ini problem. Make a backup of that file and modify your existing file.

Under their respective headings, make sure the following lines exist in your modified system.ini...

under the [drivers] section:

wave=mmsystem.dll
midi=mmsystem.dll

under the [boot] section notably:

system.drv=system.drv
drivers=mmsystem.dll
sound.drv=mmsound.drv

And under [mci]:

cdaudio=mcicda.drv
sequencer=mciseq.drv
waveaudio=mciwave.drv

Substitute files and reboot, please post your results.

Bill.

I'm ok.

Finally sat down and added the lines to the system.ini and I now have sound!!!! I am really, really thrilled to have the sound back! THANK-YOU!! :-)

Glad to hear it worked.

Bill.

I'm ok.

Bill HH - I have maybe a similar problem. Please advise. Here it is:

My Windows Media Player ("WMP") has gone dead, and I've tried everything! I have a Toshiba Satellite Pro 4340 with Win98SE, and 320MB of RAM. For no reason I can understand, my WMP will no longer play an mpg or an avi or a wav or anything else. I've rolled it back from 9.0 to 6.4 and forward again, with no luck -- in either version whenever I try to play a movie, it says "Connecting" or "Opening" but never gets any further. And I cannot exit the stuck WMP without rebooting. I re-downloaded and ran the Mpfull.exe install file from Microsoft (for WMP 6.4) and ran it, but that did not solve the problem. (And then re-ran the setup.exe for WMP 9, also with no luck.) When I'm in Safe Mode, the WMP will show the movie but no sound. I also re-installed DirectX 9.0c with no luck. I ran Dxdiag and the first time it said I have no sound card, but I do have other sounds (like the Windows bootup sound), and I also just re-installed the Yamaha DS-XG drivers from the Toshiba support website, again without solving the problem. The "no sound card" is a brand new weird event, and I can assure you I definitely have a sound card. Belarc Advisor showed some missing hotfixes but they are now all installed. Skype is working OK - I can hear the test message and the recording of my voice. What's happening?!?!?!? Help!!!

PS - More info: I have another player which I never use, DivX, and it also has the same symptoms: whenever I try to play an mpg or avi, it freezes, the whole laptop freezes and the only thing I can do is reboot using CTRL + ALT + DEL. So maybe there's a more fundamental problem common to all video playbacks. What could it be??

PPS - Yet more info: Now, when I try to run dxdiag, it hangs on any request for "sound" information under the "sound" tab. Must then reboot with CTRL + ALT + DEL. Also, when I ran SiSoftware Sandra just now and asked for DirectX Information, it also hung on the sub-request for sound information. However, I have re-run the DirectX 9.0c setup three times now. Is this a clue? Is there a bad DirectX dll file?

Also, if I go to Control Panel, Multimedia, Audio tab and click on Advanced Properties, my laptop also freezes, and I have to reboot using CTRL + ALT + DEL.

Further new news: This morning, I booted up, looked at my background processes, and turned off Mmtask.tsk, but that also did not help -- I got the same hang when I tried to adjust Multimedia Audio per the paragraph above. Are there any .cab files I should "extract" or re-run? Which ones, and how do I re-run them?

What should I do? Thanks.

By the way, Bill HH, I checked your Response No. 1 above and I DO have the .drv files in system.ini the way you instruct. Whale else could it be? Thanks.

Hya

I have to assume you did a proper reinstallation (Safe Mode, removed all old sound drivers first) of the correct sound driver for your OS and also your hard drive is malware and trojan free.

"Are there any .cab files I should "extract" or re-run? Which ones, and how do I re-run them?"

Well, try this:

Extract the following files manually from cab 53 and 54 : vcomm.vxd, vdmad.vxd, configmg.vxd, vdd.vxd, vmouse.vxd, ntkern.vxd, vflatd.vxd. into both c:\windows\system\vmm32 and c:\windows\system and reboot.

Good luck. Please post your results with particular regard to the points at which you had previous lock-ups.

Bill.

I'm Ok

Dear Bill HH: Tried your suggestion above but did not work. Please DO let me know if anything else occurs - this problem seems to be growing. Thanks!!

Glnz