A Creative or other popular sound board replacement is quite modest in cost.
The real issue is whether the existing sound device is an inbuilt or "onboard" device, and whether if so, your BIOS will let you disable it.
. if an onboard device, and the BIOS does not support disabling it, then use Device Manager to disable it. Replace the board with a third-party add-in, and pray. In 78% of the cases it will work without issue.
. wherever you purchase the new sound board, be certain they have a reasonable return policy
. add a new computer to your shopping list
I wish I could more positively answer your issue. But sound and video services are fairly fundamental aspects of the operating system, and something that proves non-compliant and no-longer supported suggests a replacement. I wish it was otherwise.
If you provide any and all details as to the "Eidos" device, including any current driver level being used, there is often a very clever purson who has worked out the issue.
Alas, that person is not me.
Best,
Bill Castner