My computer was running very slow so I purchased a registry editor to fix those types of problems. And I've run AdAware and several spyware, anti-virus programs. And I did a de-frag. I also have been going through the XP add/delete section to delete programs I don't use anymore. I never deleted any kind of drivers or anything like that. Yet I now only have sound sometimes. I have sound when playing CDs and listening to downloaded music in Windows Media Player. I can also listen to streaming audio via XMRadio. However, I get no sound at places like YouTube or when I try to stream video feeds at places like MSNBC, etc. I also went to Hallmark Cards to see if I could hear sound when an animated card plays. No sound then either. I went to Control Panel and checked my sound devices. It says everything is working properly. However, even if I check the box for the volume icon to be in my try, it doesn't show up there. And it did use to be there when everything worked right. I don't know where it went or why it went away but I can't get it back. If anyone has any suggestions, feel free to share. I'm stymied.