Creative is a pain with drivers, I am assuming you have tried using the executable file downloadable from the creative labs website and it did not detect your sound card. I will give you some steps that should fix it.
First, open your device manager and delete all instances of your sound card listed in there. Reboot your computer and run windows update, make sure to use the custom option and not the express. This has worked for some people in the past and may work for you.
If windows update doesnt do it for you, try running the executable file downloaded from the creative site again. If that doesnt work use the link below.
It is a generic driver for all 5.1 soundblaster cards, it wont give you the full control panel and other software such as the mixer and others that you would get from using the exectuable from the creative labs site.