Probably the sound card. Try checking device manager for any big yellow question marks. (right click "my computer", properties, hardware, device manager)
When you say "rebooted ages ago" do you mean restarting the pc or reformatting?
tank u 4 replying...wen i say rebooted...(i dnt rly no much about computers).... basically i gt a virus of sum kind siome time ago nd den i rebooted my compuer...wid sum kind of windows cd (my brother did this so i dont really know)....... nd evrything was wiped clean from my computer so all the files and evrything was delted i hope this helps to explain....
when i go to the device manager there is a yellow question mark on other devices.... it has 2 other yellow question marks with exclamation marks in it in the list too which say....multimedia audio controller and video controller (VGA compatible)..................i am so confused i probly have confused u aswell!! sorry....im completely clueless....get bk 2 me soon plz....if u understood anything i said!! lol...thnk u for ur help:cheesy: