Sometimes—like a ghost in the machine—Microsoft’s legacy catalog serves up a driver labeled "Creative Technology Ltd. - Audio - Sound Blaster PCI128 (WDM)." Creative Labs Ct4810 Windows 7 64 Bit Driver
They didn't forget. They chose not to. By 2009, the CT4810 was a $5 value card. Spending engineering resources to write a WDM (Windows Driver Model) driver for a chipset that cost less than a pizza was bad business. Creative Labs Ct4810 Windows 7 64 Bit Driver
That’s not a bug. That’s the sound of a card refusing to die. Creative Labs Ct4810 Windows 7 64 Bit Driver
Subjectively?
No official drivers exist. Use community-patched ES1371 drivers for Vista x64 in test mode, or accept that Windows 7 x64 and the CT4810 are star-crossed lovers. Buy a USB sound card for sanity, or keep the CT4810 for the soul.