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this problem while happened which your computer update the new driver for a device .
Whereas in device manager don,t show any yellow question mark. you can restore your PC to 2 days before the time that the device worked correctly. this action may be solved the problem , otherwise you have to uninstal the device driver and clean all other remained detailes in registry through REGEDIT BY RUN option , but in this case you must done so carefully for avoiding to deleteotherkeysand subkeys which is not related to your aim . good luck gorbesia
you need to purchase legal software, uninstall the software you have and re-install the legal copy..
If this includes your operating system, then you should backup all the files you wish to keep BEFORE re-installing the operating system..
You can sometimes get around re-installing if the software will accept a legal product key but you will still have to purchase a full and legal copy to do this.
Once done, you can contact microsoft for a release code..
first try to identify the full name of your sound card. you can download a soundcard by typing the right sound card name. i just based this answer to the message that you sent us hope it helped send me a message for any concerns.