Hi I think I have either got some sort of codec virus or somehow deleted a driver by mistake trying to get rid of a virus? I have no sound at all on youtube or myspace- also I don't have sounds like incoming mail or windows startup tune etc. Strangely though, I do have sound on windows media and also on channel 4's watch online video feature. Any ideas as to what I do next?! Seriously, this is driving me mad!! VJ

This forum is for exchange related issues. For questions about Windows Client OS please use the Windows XP SP3 Forum or Windows Vista IT Pro Forum which would be the more relevant forums for your question As a non-expert on this field, Id just provide some basic ideas: 1. Disable all Non-microsoft services in Msconfig for testing a. Start->Run->msconfig b. In the Services tab, click "Hide All Microsoft Services" and click "Disable All" c. In the Startup tab, click "Disable All". Click OK. d. Restart the computer and then check the issue Notes: It can isolate cause from 3rd party services 2. If the symptom only persisted when browses web, we may assume that issue is related to Internet Explorer somehow. You may try to reset the setting to default for IE, or reinstall it

Thank-you. Sorry I can't work out what forum is what. I'll try that.