I wonder about the Realtek update issue, as the last update screwed up my laptop HD and can't use the mic without hearing the echo or buzz all the way and only have to mute or un select the "listen" at Realtek HD mic to make my laptop have no more echos or buzz while listening to music. Do you know a way to retrieve back the Realtek without installing the Windows 7 all over again?. Windows 7 Ultimate 64 bit SP1 and wish these helps in showing what i am going through. I tried the uninstall HD of sound and keep the Realtek HD to see if can stop the echo or buzzz and it was same and even when uninstalled Realtek to see if it can help all and fix it. When i restarted it installed both Realtek and HD all back again and when i clicked the "listen" again the buzz happen. I had to un click listen at Realtek and only listen to music and that sucks as can't use mic to talk with any or even video record any music or video as only can video it without any voice . Sorry for bothering but wish the details can help and find a solution and thanks .