Only one google hit for the error message and that doesn't help: http://www.google.com/search?q=%22Ct.Helper%20MFC%20application%20has%20encountered%20a%20problem%22
Not clear even if it's a hardware issue causing both the program to fail and losing sound or another issue causing the program to fail and that in turn causing the sound to disappear.
Things to try:
- system restore back to when it still worked
- reinstall the drivers from the CD
- remove the sound card from device manager, then reboot, and install the drivers as you did the first time
- uncheck this program from msconfig>start up tab (if present) and see what happens
- try the sound card in a different PC to see if it's defective
See if you can find out the name of the program running (using Task Manager). Then see if it's anything other than the real one. That should take care of your trojan suspicions.
Hope this helps.
My Dell 8300 running XP Sp2 with an Creative Sound Blaster Audigy 2 sound card has lost its sound. When I boot since this problem arose I get an error message saying Ct.Helper MFC application has encountered a problem and must close. There is also a message reading: "The instruction at "0x00c4b596" referenced memory at "0x00000008" could not be read"
An internet search has found that there is also what appears to be a trojan with the same name. Checking with Norton, Adaware, Sbybot, all come up clean.
How do I get my sound back?