Windows on external drive ,one day the sound is working ,the next day i turn it on and no sound?It is showing the Apple driver on the sound.And on sound the Apple drive is checked as the one to use.I click the Apple driver to install again.Since this has been going on i haven,t had Windows saying it needs to check the drive.How can the sound be working fine one day and the next getting no sound?When nothing has been changed?I know computers have there own minds. 