You need to supply more information. What is the operating system? Do you have any audio devices listed in device manager?
My 16 year old downloaded Furcadia while I was away. When I came home, he was playing and listening to music (playlist on another site.) I got on computer and removed Furcadia. Suddenly, the computer had no sound. I checked all settings and hook ups. I went into control panel and checked to see if there were other harmful programs that had been downloaded. I also removed Highjack This. Still no sound. I tried System Restore, but I received "The application or DLL c:\WINDOWS\PCHealth\HelpCtr\Binaries\pcshell.dll is not a valid Windows image. Please check against your installation diskette." I tried running Ad-Aware. The language was in German with no English choice! (Never had that happen before!) I redownloaded Ad-Aware, scanned, removed spyware, and still no sound or system restore. I downloaded Glarysoft to check for registry problems and repair files. Still no sound and no ability to system restore. Could you please help?