Audio device not detected

My audio device is not connected. REsently i have uninstalled and insalled some things to make my computer faster then the isue started. I dont know whats the matter thou. HELP
 
More information is needed. Laptop? Desktop? Type of audio hardware installed in PC? Other hardware (motherboard, chip set, ...)? And what did you uninstall and install, was it software or hardware?
 
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