Hi everyone, A newby here. I lost the sound on my Toshiba L350 laptop just after I installed an audio analyser program which I beleive tried to instal a soundblaster drive, but I'm not sure! However, I've tried deleting, updating and unstalling the Realtek HD audio driver with no success. I've also downloaded the lated drive from the Realtek site (ver.2.68, dated 12/4/2012). Each time open the driver and run the test, I can see the bar graph change with the test signal but still no sound. I also ran Microsoft Fixit which says there are no issues with the sound and even re-installed windows vista using the 'clean windows option - still :-on change. Any help would be most welcome Geoff.