ahhh! i have the same exact problem! whenever i start up cs:s, windows gives me the exact pop up saying that hl2 needs to exit becuase it failed to run or something like that. AND the itunes thing is similiar to mine as well! sometimes whenever i listen to music or watch youtube videos, my song doesnt start or make sound and the youtube videos stop at 2 seconds. ahh can someone help both of us?

i've reinstalled steam and cs:s and i've also deleted clientregistry.blob and nothing works! help!