If you lost your audio with the Dell IDT update, go into control panel, system, device settings, expand the sound section, and find the IDT audio driver. Click on it, then go to the driver tab and click on “Roll Back Driver”
This will roll you back to the last working driver.
And as my Sister said… it’s no wonder folks are saying “I don’t want Vista” with stories like this. And she HAS a Vista machine and loves it! It annoys me when “lack of testing” smacks me in the face.