Hi, Creative has a driver download page here: Creative Labs Europe | Customer Support: Downloads You'll need to know what type of blaster you have though eg, Audigy, X Fi and so on. Good luck.

I did some looking and that sound card has now been discontinued. You can find XP drivers here:
Download Creative Labs Audio PCI 128 driver 5.12.1.4119 Driver for Windows 95/98/9X/ME/NT/2000/2K/XP/2003 - Softpedia They may work in Vista but perhaps you've already tried them. Your only other option is to upgrade the sound card. The basic Creative Sound Blasters are usually very cheap.

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AMD X2 6400+ 3.2GHz BLACK EDITION::SCYTHE SAMURAI COOLER::GA-M51 M/B::3GB DDR2 6400RAM::GEFORCE 8800GTS320/625/900MHz DRIVER '174.74' BETA::160 RAID 0 SATA2::SOUND BLASTER AUDIGY/'DANIELS' DRIVERS::LITE-ON DVD RW/PIONEER DVD::HIPER 530W MODULAR::THERMALTAKE ARMOUR Jr CASE::RAZER COPPERHEAD MOUSE::VISTA HOME PREMIUM SP1