Thanks for input Stu
Yes, the onboard soundcard was disabled in the BIOS. Apparantly this is intentional to prevent conflict with 2 soundcards.
Whether that is an issue with Softrock, I do not know but think it is unlikely. I can now select either my Creative Audigy PCI card or the Onboard Soundcard.
Further testing now required, but happily can now move on.
( About 3 years ago, I had this Rx/Tx v.6.1 working with another XP computer. I had about 100 QSOs. I do not remember running into this problem, so I assume
it is motherboard dependant (BIOS) )