ksiemb :
1. Have a Windows restore point back to when there was no problem ? Save all personal folders/files and restore.
2. Installed any new software that could have changed the driver , including Windows Update ? You could try rolling back the driver to previous version.
Skype FINALLY gave me a message - can't detect your sound card.
Upon further investigation, guess what, Dell Vista does not have
a sound card. So controllers aren't the point. I can buy a USB microphone which should take care of the problem.
Thanks for your help - really appreciated.